The advances in the study of sanitation have brought the work of the plumber into prominence. The plumber of today must be more than a mere mechanic; he must be somewhat of a sanitary engineer, for it devolves upon him to help maintain the health of the community. Sanitary plumbing is a protection against disease and is a necessity for healthy homes, and so the plumber has not only a good trade, but one which advances the welfare of the community in which he lives. Epidemics, fevers and other ills are often directly traceable to faulty plumbing; and the conscientious workman, who makes his trade a scientific one, performs a real public service. The hygiene of the dwelling house as well as of the factory and office building must receive due consideration if the productive power of the workers is to be kept at its highest point, and this work to a large extent devolves upon the plumber.
Modern plumbing, as a trade, consists in the arranging and running of pipes to supply water to buildings, the setting up of fixtures in order that the supply may be utilized and the installation of other pipes for resulting waste matter. The plumber must also have a knowledge of hot-water and steam-heating systems, although such work often is done by a steam fitter, whose duties will be discussed later. The young man who desires to become a plumber, must first serve as a plumber's helper. He carries the tools, supplies the plumber with materials, cuts pipes and threads and makes minor fittings. As an apprentice or helper, he has an opportunity to learn by observation and gradually to acquire skill in his trade. The period of apprenticeship is dependent upon the ability of the man and upon local conditions, and may last from two to four years. The plumber's helper acts as an assistant until he has fully demonstrated his ability to install plumbing, when he attains the rank of journeyman plumber. His duties then include the installation and repair of all plumbing and fixtures, which involve the running and connecting of pipes, brazing and wiping of joints and the connecting of traps, vents, cocks, etc.
The journeyman plumber may develop into a foreman, who supervises the installation and maintenance of all classes of sanitary plumbing and fixtures. To become a foreman he must be an all round licensed plumber and must be able to work from drawings and to lay out all types of work. He must have had wide experience on contracts while a journeyman plumber, and be an expert in his line.
If the plumber desires to specialize along one line, he has an opportunity to do so. He may, for instance, become a marine plumber, whose duties are to install and repair all plumbing equipment and fixtures on ships. Such a man must have served his apprenticeship with a marine plumber and must be an adept in handling large sizes of lead pipe.
The plumber may prefer to build up a business of his own in the community in which he works. Since he owns his tools, they, with his experience, can form the foundation of that business, even if he has only a limited amount of capital. It is the usual thing for the plumber in the smaller cities to run his own business and, if he has the tact and determination to accomplish that much, the business may become a growing one.
The plumbing trade has now often come to be a merchandizing business, and the plumber who owns his business is now also selling supplies. This is a very satisfactory method of combining merchandising with a trade, for the plumber does not have to keep a very extensive stock, but handle just the type of goods that will be needed for his work.
Since all plumbing must be installed properly, as the building departments inspect not only the plans but also the buildings, there is an opportunity for the wide-awake man to become a building inspector. An inspector must have a wide knowledge of the plumbing trade and should have learned it just as thoroughly as though he expected to practice it.
The man who prefers steam fitting to plumbing has a trade which demands a thorough knowledge of the fitting of all types and sizes of steam lines, the making of pump, boiler, oil, air and radiator connections and the connecting up and adjusting of steam thermostats and gages. He must first become an apprentice or helper, and assist the journeyman steam fitter. He must be able to read drawings and make ordinary measurements and calculations, in order that he may qualify as a steam fitter. As a journeyman steam fitter, he must be thoroughly skilled with his tools, understand general pipe fitting, be able to calculate and cut lengths of pipe, be able to install either vertical or horizontal steam lines and understand thermostat heat control.
The ambitious steam fitter may become a foreman and then, in addition to his knowledge of the trade, he must have a knowledge of men and an ability to control them and lay out their work. The steam fitter may own his business, if he proves capable, or he may work with a plumber or be in partnership with him. In small communities, the plumber may also do the steam fitting.
The man who takes up plumbing should have at least a common-school education. If he wishes to advance and become either a journeyman plumber or run his own business, he should have a technical or trade school training. In every large city, and in many of our smaller ones, trade schools are being established to give a preliminary knowledge of the mechanical trades both as to theory and practice. Such schools do not take the place of apprentice work, even though the training is practical, but they do give the theory of the subject along with the practice, and eliminate one or two apprentice years.
The young apprentice can, if unable to attend a trade school, secure instruction in evening technical schools or, if he is not so situated as to be able to attend either, he may obtain a knowledge of the theory of his trade through correspondence courses and books.
Of course, with such work as the technical or trade school may offer on the subject of plumbing itself, the man who desires to advance and assume leadership in his occupation must have a good command of the English language, the ability to interpret plans and drawings in which mechanical and scientific thought find their expression, and a knowledge of physics, chemistry and mathematics. He must understand the principles of hygiene and sanitation and know how to apply them. The expense of the training for the plumber's trade is very low, for the trade and technical schools, as well as the night schools, are usually a part of the educational system of the community and therefore furnish free tuition. Further information as to such schools in the community can be furnished by the local or state Board of Education.
The wage of a journeyman plumber varies from $35 to $50 a week and the average is about $44. The apprentice or helper gets about $25 a week. The man who runs his own business, and does some merchandising along with it, is able to earn a larger amount. A good plumber should earn not less than $2,000 to $3,000 a year and, if he has a merchandising business or employs several men to work with him, he may make from $3,000 to a possible $6,000 a year. The plumbing trade provides steady employment at good wages and with good hours, but the man who does not loaf on his job but puts all his ability and enthusiasm into his work is the one who earns the best income. The small town offers decided advantages on account of the growing appreciation of modern plumbing facilities, while the large cities, where constant building and remodeling take place, offer a practically unlimited field for the plumber and steam fitter.
The young man who wants to be either a plumber or a steam fitter must be strong physically. He must be intelligent, industrious and persevering, and possess tact and determination, or he will never be able to be more than a fair workman. A surly man antagonizes whomever he works for, so a courteous and obliging disposition is as necessary to the man who would become an efficient plumber, as his ability to manipulate the tools properly. His work is often with housewives and persons who do not understand plumbing, so he must, even on the smallest job, combine good temper with his skill. Personality counts in the plumbing business as in every other line of work, and a pleasing personality will prove as valuable to the plumber as his knowledge of the trade.
The trade of the plumber is one that offers a good future, for all over the country more and more plumbing is being used. Farm houses, which formerly depended upon pumps for their water supply, now are being remodeled so as to include sanitary plumbing; or, as new houses are being built, the bathrooms, sinks in the kitchens and other conveniences are installed along with the furnaces. The increasing number of bathrooms that are being installed in these farm houses alone shows the possibilities that lie ahead of the ambitious plumber. The work on sanitation, which is being developed by state and national boards of health, as well as by individual effort, is also bringing work to the plumber.
The work is hard and the plumber is often called upon at most inconvenient times, especially in cold weather. The work is also dirty, though not unhealthy. But the man who is fond of tools and is willing to work hard, will find that there is a steady demand for trained plumbers at good wages and that such a workman has exceptional opportunities to go into business for himself. The plumber who enjoys his work and becomes a sanitary expert in his community and helps to keep that community healthy makes a vital contribution to the welfare of his fellow men.
BIBLIOGRAPHY
COSGROVE, J. J.: "Principles and Practice of Plumbing," Standard Sanitary Manufacturing Co., Pittsburgh, Pa., 1914.
DIBBLE, S. E.: "Elements of Plumbing," McGraw-Hill Book Co., Inc., New York, 1918.
PUTNAM, J. PICKERING: "Plumbing and Household Sanitation," Double-day, Page & Co., New York, 1911.
STARBUCK:, ROBERT MACY: "Modern Plumbing Illustrated," The Norman W. Henley Publishing Co., New York, 1907.
"Questions and Answers on Practice and Theory of Sanitary Plumbing," R. M. Starbuck and Sons, Hartford, Conn., 1919.
Friday, May 29, 2009
Thursday, May 21, 2009
What is hydronics?
Hydronics is a term that was introduced in the 1940s to refer to a system of heating or cooling of an internal area using fluids in either vapor or water form. These fluids are then circulated throughout a series of pipes or tubes to produce a desired room temperature. Although this official term was established in the 1940s, the process of using hydronics or “wet” materials to first heat, then later to cool, a home has been in existence for many years, beginning with the invention of cast iron boilers.
Initially working on the principle of gravity, cast iron boilers, which were fueled by either coal or wood, forced hot fluids through the top of the boiler and into wrought iron pipes. The heat produced from these fluids was then expelled to radiators or into cast iron baseboards. Meanwhile, as heat was produced, the hot fluids were returned back to the boiler. This cycle was repeated as necessary to produce heat. To regulate the heat generated, a draft damper was used, which was operated manually via a wheel or lever in the home. Another option to regulate the heat was to adjust a valve on one of the radiators.
Although cast iron boilers were popular to use, they had many disadvantages. These included the need for someone to continuously stoke the fire and to remove any ashes produced on a daily basis. Additionally, cast iron boilers were only intended to provide heating for a home. While boilers provided basic heating in a house, many inventors pondered how to cool a home. Some pursued the concept of cooling air temperature by blowing air across ice blocks or by spraying the air with cooled water. These cooling procedures worked well and had many followers. However, it would be some time before both the heating and cooling technologies of the time would combine to produce an energy and cost efficient method of regulating the temperature within a home.
With the introduction of electricity and the use of oil as a furnace fuel, a new hydronics heating system was developed. This system relied on a pump that was controlled by a thermostat, which determined when a heating temperature should be turned on or off. While this system was being developed, air-cooling systems were also developing rapidly, with the process of forced air circulation leading the methods used to produce air conditioning systems. For the first time, both the heating and air cooling industries considered combining forces to see how the two sectors could unite to provide consumers with a single source for their home and business climate control needs.
By the mid 1940s plans were being developed for the creation of heating units other than the iron radiators and baseboards used for decades. Yet, it wasn’t until the mid 1950s when the successful use of the “valance system” was implemented. By establishing a series of pipes or tubing that were suspended in a ceiling, the system produced radiant heat through the floor. However, this system could not be used for successfully cooling a home. Then, in the late 1950s, hydronic heating was combined successfully with conventional forced air-cooling systems to produce a unified climate control system for the home. In the meantime, inventors continued to work on a totally hydronic heating and cooling system that would combine hot water and cool water into one cyclical heating and cooling process.
In the early 1960s after many years of experimentation and hard work, an updated valance system was produced that could generate heat as well as air conditioning. As the popularity of using unified hydronics systems grew, in the 1970s the term hydronics came to represent a new type of technology. Many hydronic valance systems were installed in commercial buildings including in the building that housed the boiler and radiator manufacturers trade association. Because of the success of the hydronics system, in the late 1990s a non-profit association, known as The Hydronic Foundation, Inc. (THFI) was established to pursue the further study of hydronics. Additionally, its goal is to provide economically viable hydronic heating and cooling systems to the public.
While The Hydronic Foundation, Inc. continues to evaluate the future of hydronics, many other reports have been prepared by individuals and firms that propose the use of hydronics, specifically the valance system, for commercial and residential applications. These people note that the valance system is particularly well suited to establish in building that are two levels in height. This is because the first floor can be heated or cooled radiantly while the second floor can be heated or cooled via a forced air handler. Using a hydronic system this way also provides a cost effective alternative to other heating and cooling measures because consumers do not need elaborate heating and cooling appliances to be setup and thus save on equipment and usage costs.
Although hydronic systems can be economical to use, depending on the type of home that you live in and the layout of the house, a hydronics system may not fit into your home’s style. But, where it does mesh cosmetically, it can offer you a wealth of benefits including running efficiency and ease of maintenance. So, if you are looking for a well-designed and developed heating system for your home, ask Lunt Marymor about hydronics!
Initially working on the principle of gravity, cast iron boilers, which were fueled by either coal or wood, forced hot fluids through the top of the boiler and into wrought iron pipes. The heat produced from these fluids was then expelled to radiators or into cast iron baseboards. Meanwhile, as heat was produced, the hot fluids were returned back to the boiler. This cycle was repeated as necessary to produce heat. To regulate the heat generated, a draft damper was used, which was operated manually via a wheel or lever in the home. Another option to regulate the heat was to adjust a valve on one of the radiators.
Although cast iron boilers were popular to use, they had many disadvantages. These included the need for someone to continuously stoke the fire and to remove any ashes produced on a daily basis. Additionally, cast iron boilers were only intended to provide heating for a home. While boilers provided basic heating in a house, many inventors pondered how to cool a home. Some pursued the concept of cooling air temperature by blowing air across ice blocks or by spraying the air with cooled water. These cooling procedures worked well and had many followers. However, it would be some time before both the heating and cooling technologies of the time would combine to produce an energy and cost efficient method of regulating the temperature within a home.
With the introduction of electricity and the use of oil as a furnace fuel, a new hydronics heating system was developed. This system relied on a pump that was controlled by a thermostat, which determined when a heating temperature should be turned on or off. While this system was being developed, air-cooling systems were also developing rapidly, with the process of forced air circulation leading the methods used to produce air conditioning systems. For the first time, both the heating and air cooling industries considered combining forces to see how the two sectors could unite to provide consumers with a single source for their home and business climate control needs.
By the mid 1940s plans were being developed for the creation of heating units other than the iron radiators and baseboards used for decades. Yet, it wasn’t until the mid 1950s when the successful use of the “valance system” was implemented. By establishing a series of pipes or tubing that were suspended in a ceiling, the system produced radiant heat through the floor. However, this system could not be used for successfully cooling a home. Then, in the late 1950s, hydronic heating was combined successfully with conventional forced air-cooling systems to produce a unified climate control system for the home. In the meantime, inventors continued to work on a totally hydronic heating and cooling system that would combine hot water and cool water into one cyclical heating and cooling process.
In the early 1960s after many years of experimentation and hard work, an updated valance system was produced that could generate heat as well as air conditioning. As the popularity of using unified hydronics systems grew, in the 1970s the term hydronics came to represent a new type of technology. Many hydronic valance systems were installed in commercial buildings including in the building that housed the boiler and radiator manufacturers trade association. Because of the success of the hydronics system, in the late 1990s a non-profit association, known as The Hydronic Foundation, Inc. (THFI) was established to pursue the further study of hydronics. Additionally, its goal is to provide economically viable hydronic heating and cooling systems to the public.
While The Hydronic Foundation, Inc. continues to evaluate the future of hydronics, many other reports have been prepared by individuals and firms that propose the use of hydronics, specifically the valance system, for commercial and residential applications. These people note that the valance system is particularly well suited to establish in building that are two levels in height. This is because the first floor can be heated or cooled radiantly while the second floor can be heated or cooled via a forced air handler. Using a hydronic system this way also provides a cost effective alternative to other heating and cooling measures because consumers do not need elaborate heating and cooling appliances to be setup and thus save on equipment and usage costs.
Although hydronic systems can be economical to use, depending on the type of home that you live in and the layout of the house, a hydronics system may not fit into your home’s style. But, where it does mesh cosmetically, it can offer you a wealth of benefits including running efficiency and ease of maintenance. So, if you are looking for a well-designed and developed heating system for your home, ask Lunt Marymor about hydronics!
Labels:
efficient heating technologies,
heating,
hot water,
hydronics
Tuesday, May 12, 2009
Leaks Can Hide Outside
In order to find irrigation equipment leaks, you must be aware that not all leaks are obvious, regardless of the type of irrigation equipment you use (manual, sprinkler or drip).
First check for overly, bright green or soggy spots, where broken spray heads, bubblers or underground pipe cracks will tell on themselves. Buried pipes, hoses or drip lines leaking into sandy, porous soil may not show up clearly. Automatic sprinkler and drip systems that generate a hissing sounds are likely leaking. Also remember to check drip systems for damage from foot traffic or gnawing pets or pests. It is important to note that water from broken irrigation piping will only accumulate and pond when the manual or automatic control valve is on. If the leak shows 24/7, and the "tattle-tail" indicator on the water meter is spinning, then the leak is on the plumbing supply side of the irrigation system. Keep an eye out for leaky hoses and dribbling spray nozzle connections... and fix them!
Remember, saving water saves energy, money... and the planet!
First check for overly, bright green or soggy spots, where broken spray heads, bubblers or underground pipe cracks will tell on themselves. Buried pipes, hoses or drip lines leaking into sandy, porous soil may not show up clearly. Automatic sprinkler and drip systems that generate a hissing sounds are likely leaking. Also remember to check drip systems for damage from foot traffic or gnawing pets or pests. It is important to note that water from broken irrigation piping will only accumulate and pond when the manual or automatic control valve is on. If the leak shows 24/7, and the "tattle-tail" indicator on the water meter is spinning, then the leak is on the plumbing supply side of the irrigation system. Keep an eye out for leaky hoses and dribbling spray nozzle connections... and fix them!
Remember, saving water saves energy, money... and the planet!
Labels:
hot water,
irrigations,
leaks,
save water,
sprinkler
Check your Water Heater!

Little leaks can make BIG problems!
Most people visit their water heaters only if the hot water stops.
Make it a habit to check yours on a regular basis!
If you notice a puddle of water around the bottom of the tank, it probably indicates a leak created by corrosion - a sure sign of old age, and the most common reason for replacing the tank. If the tank wall is corroding, more problems are coming, and it's time to retire the tank and get a new energy-saving model.
Conventional water heater tanks can last up to 15 years with proper care. If your believe your water heater needs a little (or a lot) of love, contact the professionals at Lunt Marymor, and we will take care of it: http://luntmarymor.com/request.html
Be Water and Wastewater Wise
Choose Products with Care
In your pursuit to save water the home appliances you purchase can make a big difference. However, some water-miser washing machines that you won't find on EBMUD's rebate list are those that use silver ion technology. These machines impregnate clothing with silver ions that may also be washed down the drain. Because silver is an aquatic toxin, many wastewater agencies are concerned that the silver from these washing machines may end up in our waterways, where it can harm fish.
For more information on nanosilver, log on to http://www.ebmud.com/cleanbay or e-mail cleanbay@ebmud.com or call 510 287-1651.
For information on EBMUD's clothes washer rebates, visit the Drought Help Center on http://www.ebmud.com/
In your pursuit to save water the home appliances you purchase can make a big difference. However, some water-miser washing machines that you won't find on EBMUD's rebate list are those that use silver ion technology. These machines impregnate clothing with silver ions that may also be washed down the drain. Because silver is an aquatic toxin, many wastewater agencies are concerned that the silver from these washing machines may end up in our waterways, where it can harm fish.
For more information on nanosilver, log on to http://www.ebmud.com/cleanbay or e-mail cleanbay@ebmud.com or call 510 287-1651.
For information on EBMUD's clothes washer rebates, visit the Drought Help Center on http://www.ebmud.com/
Labels:
clothes washer,
ebmud,
nanosilver,
silver ion technology,
washing machine,
wastewater,
water
Friday, May 8, 2009
Water Pressure / Water Flow
Water Pressure / Water Flow
A Brief Introduction
For most of us, our water comes from a municipal water system, where it's usually extracted from various groundwater sources and treated to remove impurities. It is then pumped to large water towers that rise above than the highest delivery point in the system. Gravity provides the pressure that forces the water through the water mains and eventually into our homes.
Remember that water in a closed system will possess the same characteristics as it does in a lake or a reservoir. That is to say that the water pressure at a given elevation in any pipes carrying it away from its source will be the same as that found at a comparable elevation directly below the surface level at the source.
This is another way of saying that water seeks its own level. It can be demonstrated by siphoning fluid from one container to another with a rubber hose; it only works when the source is at a higher elevation.
A cubic foot of water weighs 62.4 lb. and exerts .4333 lbs of pressure per square inch on the bottom of its container at a depth of one foot.
Therefore, the discharge pressure of a water storage tower 100 ft. tall will be 43.33 psi. If your house is in a valley 50 ft. below the bottom of the tower, the theoretical water pressure at your house will be approximately 65 psi, reduced by the friction in the pipes.
The pressure of the water delivered to your home will vary depending on your elevation relative to the source, as well as the complexity and condition of the piping system that delivers it. But once established, the pressure will be constant, and will not change based on demand.
Typical residential systems are designed to function under a pressure of 40-60 psi. If the water pressure entering your home exceeds this level, you may need to install a pressure regulator in the line to reduce the pressure to an acceptable range. This protects the equipment in your home from damage caused by excess force exerted by the water.
On the other hand, if the pressure coming from the main is below 40 psi, you may need a pressure-booster to bring it up to acceptable levels.
Do not confuse water pressure with water flow.Water flow is the result of pressure on volume. Volume is the amount of water available for delivery, and pressure is the force exerted on it. There is a big difference between the two.
If the low pressure in your system is caused by an obstruction in a supply line, or if the line to your house is undersized, pressure may not be able to be increased.
A very old pipe may contain mineral build-up or corrosion that reduces its internal diameter by half or more. This would be like a fireman trying to douse a five-alarm fire with a garden hose. It can't be done.
Adding a second hose to the same spigot will only reduce the flow in both by half. Pressure is a one-way street. It can always be reduced, but it cannot be increased unless there is sufficient volume to sustain it, and the volume is strictly a factor of pipe capacity.
Think of your plumbing system as an hourglass, with the city water main on the top, and the fixtures in your house being at the bottom.
Under a constant pressure, such as in a city water main, only so much water can pass through the supply line in the middle in a given amount of time. It is not affected by demand, so adding a booster pump on the bottom will not affect it.
These principles apply not only to the service to your house, but to branch lines within your house as well.
The standard residential supply line is ¾ inches. This can feed two ½ inch lines to full capacity simultaneously.
But most mechanical designs call for a ½ inch line to each bathroom. They can supply two 3/8-inch lines to capacity, but not another ½ inch line at the same time. That is why a person taking a shower will notice a decreased water flow when someone flushes a toilet in the same room.
'Carwash' showers and oversized whirlpools may need increased water flow to operate the way you expect them to, but if the available volume is insufficient, increasing the pressure will not help.
That's why it's important to identify your needs before construction begins so that an adequate water supply is provided where you need it.
In new construction, it's easy to tell whether your home's water flow is adequate because the pipes are new, so all you have to do is measure it. But in older homes, when the flow drops, it's more difficult to identify the cause. If your neighbors all have adequate water flow and you don't, then the chances are there is something wrong either with your supply line or the branch lines inside your house, and the only solution is to replace them.
A Brief Introduction
For most of us, our water comes from a municipal water system, where it's usually extracted from various groundwater sources and treated to remove impurities. It is then pumped to large water towers that rise above than the highest delivery point in the system. Gravity provides the pressure that forces the water through the water mains and eventually into our homes.
Remember that water in a closed system will possess the same characteristics as it does in a lake or a reservoir. That is to say that the water pressure at a given elevation in any pipes carrying it away from its source will be the same as that found at a comparable elevation directly below the surface level at the source.
This is another way of saying that water seeks its own level. It can be demonstrated by siphoning fluid from one container to another with a rubber hose; it only works when the source is at a higher elevation.
A cubic foot of water weighs 62.4 lb. and exerts .4333 lbs of pressure per square inch on the bottom of its container at a depth of one foot.
Therefore, the discharge pressure of a water storage tower 100 ft. tall will be 43.33 psi. If your house is in a valley 50 ft. below the bottom of the tower, the theoretical water pressure at your house will be approximately 65 psi, reduced by the friction in the pipes.
The pressure of the water delivered to your home will vary depending on your elevation relative to the source, as well as the complexity and condition of the piping system that delivers it. But once established, the pressure will be constant, and will not change based on demand.
Typical residential systems are designed to function under a pressure of 40-60 psi. If the water pressure entering your home exceeds this level, you may need to install a pressure regulator in the line to reduce the pressure to an acceptable range. This protects the equipment in your home from damage caused by excess force exerted by the water.
On the other hand, if the pressure coming from the main is below 40 psi, you may need a pressure-booster to bring it up to acceptable levels.
Do not confuse water pressure with water flow.Water flow is the result of pressure on volume. Volume is the amount of water available for delivery, and pressure is the force exerted on it. There is a big difference between the two.
If the low pressure in your system is caused by an obstruction in a supply line, or if the line to your house is undersized, pressure may not be able to be increased.
A very old pipe may contain mineral build-up or corrosion that reduces its internal diameter by half or more. This would be like a fireman trying to douse a five-alarm fire with a garden hose. It can't be done.
Adding a second hose to the same spigot will only reduce the flow in both by half. Pressure is a one-way street. It can always be reduced, but it cannot be increased unless there is sufficient volume to sustain it, and the volume is strictly a factor of pipe capacity.
Think of your plumbing system as an hourglass, with the city water main on the top, and the fixtures in your house being at the bottom.
Under a constant pressure, such as in a city water main, only so much water can pass through the supply line in the middle in a given amount of time. It is not affected by demand, so adding a booster pump on the bottom will not affect it.
These principles apply not only to the service to your house, but to branch lines within your house as well.
The standard residential supply line is ¾ inches. This can feed two ½ inch lines to full capacity simultaneously.
But most mechanical designs call for a ½ inch line to each bathroom. They can supply two 3/8-inch lines to capacity, but not another ½ inch line at the same time. That is why a person taking a shower will notice a decreased water flow when someone flushes a toilet in the same room.
'Carwash' showers and oversized whirlpools may need increased water flow to operate the way you expect them to, but if the available volume is insufficient, increasing the pressure will not help.
That's why it's important to identify your needs before construction begins so that an adequate water supply is provided where you need it.
In new construction, it's easy to tell whether your home's water flow is adequate because the pipes are new, so all you have to do is measure it. But in older homes, when the flow drops, it's more difficult to identify the cause. If your neighbors all have adequate water flow and you don't, then the chances are there is something wrong either with your supply line or the branch lines inside your house, and the only solution is to replace them.
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