Water Pressure Booster Pump & Tank Systems InspectAPedia® -
Guide to Pumps & Pressure Tanks Used to Boost Water Pressure in Buildings
Adding a water pressure boost pump to private, community,or municipal water supply
Adding a water pressure boosting pump to private well, cistern, or spring systems
How to add a booster pump to improve water pressure on upper building floors
Connecting water pumps and pressure tanks in series - details.
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This article describes the use of water pressure boosting systems that add a pump and pressure tank to improve water pressure and flow.
Readers of this document should see
WATER PRESSURE LOSS DIAGNOSIS & REPAIR before assuming that a water pressure problem is due to the
community supply system pressure or private well itself.
Water pump and pressure tank repair diagnosis & cost describes a specific case which offers an example of diagnosis of loss of water pressure, loss of water, and analyzes the actual repair cost.
When and Why are Water Pressure Booster Systems Needed
Poor city water pressure: Some community water supplies may provide only modest incoming water pressure, perhaps at 30 psi or even less. Some examples of low water pressure supply sources even where community or municipal water supply is provided are listed here.
Effect of building height on water pressure: The Home Reference Book points out that Gravity is another source of pres-
sure loss. Energy is required to push the water uphill. For every one foot we push water up, we lose 0.434 psi. Another way of saying this is that it takes one psi to move water up 2.31 feet.
A plumbing system will typically lose eight psi of water pressure in a two-story house, getting the water from the basement up to the second floor bathroom. With no water flowing, the static pressure at the street main may be 60 psi, but the static pressure at the second floor basin might be 51 psi. Houses that are above the street or have third story plumbing fixtures, have a pressure disadvantage.
Homes at the end of a water supply line: Community water supply systems serving just a few or even many homes, but with some homes near the end of the system
Buildings located high above a water supply line: or located far uphill from the pumping station receiving only modest incoming water pressure, perhaps less than 30 psi.
Tall residential properties requiring additional water pressure to serve upper floors. For a tall home connected to a community water supply providing incoming water at only 30 psi, for example, the top floor may see 17 psi unless a booster pump and pressure tank are installed. (Very tall buildings such as skyscrapers and offices and multi-story apartment buildings are more likely to install a rooftop water supply tank which is fed by a pump from street level but which in turn provides water down through the building by gravity.) Sketch, courtesy of Carson Dunlop
Gravity water systems: Community water supply systems serving many homes but supplying water only during certain hours of the day, or only at very low pressure. For example San Miguel de Allende, Mexico, with a population of about 100,000 people, is served by nine water wells and pumping stations. But water is delivered to most homes by gravity, and in some seasons, only at certain hours of the day. A photo of a rooftop water storage system of this type can be seen at Rooftop Water Systems.
Problems with the water water service pipe connecting the home to city water mains: Even if a municipal water system gives good pressure and quantity, as the Home Reference Book points out, the city's own water shutoff
valve outside but near the property line may also restrict flow or the supply line from the street to the house may be undersized, damaged or leaking. Long runs of relatively small (1/2-inch diameter) pipe result in considerable pressure drop, especially with more than one fixture flowing. Solutions include replacement with larger pipe or shortening the runs, but in some cases homeowners may try adding a local booster pump instead.
Adding plumbing fixtures (a new bathroom, for example) without enlarging or adding pipes often leads to pressure complaints.
A crimped, damaged or clogged pipe within the house will adversely affect pressure. This is common with amateurish work. On a private system, a defective, undersized or poorly
adjusted pump will result in poor pressure. Individual faucets may also be defective.
Homes on gravity water systems such as we describe in the San Miguel de Allende case usually install a rooftop water tank or cistern to which water is replenished periodically. The rooftop water cistern provides water to the local building whenever it is needed.
But some homes in such a community may because of their location or construction or because they have no high spot to place their water tank, have only very low water pressure.
What are the Components of a Water Pressure Boosting System
Our sketch, courtesy of Carson Dunlop and edited by the author shows a simple one line jet-pump and pressure tank connected to the incoming water line in a building. Our photo at page top shows a typical water pressure booster pump and tank system for sale at Don Pedro's Ferreteria in San Miguel de Allende.
The incoming community water supply line which normally is fed through a pressure regulator and into building supply piping is first connected to a water pump, usually a 1-line jet pump. The pressure regulator control is not shown in this sketch.
The water pump is in turn connected to a pressure tank, possibly a large one to give a good high pressure water supply to the building.
As water is drawn into the home (someone turns on a faucet) the pressure tank feeds pump-boosted water pressure to the building, and as water pressure drops in the water tank, the jet pump draws more water from the community supply line, boosting its pressure into the pressure tank.
Typically the booster pump pressure control switch will be set to operate in the 30-50 psi range, providing good water pressure to the building.
In a private well water supply system this pump and tank combination may be connected directly to the well, that is, the incoming water line shown in the left of the sketch is connected to a foot valve immersed in the water well. at WATER PUMP, ONE LINE JET we discuss one-line jet pumps in more detail. at WATER PUMP CONTROLS & SWITCHES we discuss the pump pressure control switch and how it can be adjusted to provide higher water pressure.
What kind of water pressure booster pump do we need?
The reason that a typical residential property needs just a one-line jet pump to provide its water pressure boost is that there is already water arriving at the building under some pressure - the pump does not have to combine lift of the water from deep in the ground to high in the building.
Our photo of a pressure booster pump and tank system at left (and at page top) shows that stainless steel parts were used to enclose the pump parts: this system is designed for outdoor use in a non-freezing climate. You can see the pressure gauge and the gray box housing the pump pressure control switches above the stainless-steel covered pump assembly itself.
Do we need a more powerful water pump or larger diameter water supply piping?
Some water pressure booster applications may require a more powerful pump than the type we discuss here, particularly if the anticipated water flow or usage rate in the building is high.
Carson Dunlop's chart at left explains that in an individual plumbing system (that is, changing nothing but water flow rate), the water pressure observed at a fixture (and in the piping) will drop off significantly as the water flow rate increases.
This chart explains why the water pressure in your shower may fall off substantially during your bathing if someone else in the building flushes a toilet or turns on the dishwasher.
The chart also demonstrates that using larger diameter piping for the water supply in a building can significantly reduce the pressure drop when multiple fixtures are running at the same time.
Using a Booster Pump to Improve Water Pressure on the Upper Floor of a Building
When incoming water pressure at a building is low, a water pressure "booster pump" may be installed on upper building floors or on a building roof to provide improved water pressure for the occupants of upper building floors.
If the incoming water pressure is from a municipal system and the building is just two or three floors high, the booster pump might be on ground level, as we described at the start of this article.
But if the incoming water pressure at a building is being provided by a well pump and water pressure tank system, and if the building is taller than three floors, the existing well pump may not be capable of delivering adequate water pressure nor adequate water floor to occupants of a fourth or higher floor.
Installing a Booster Pump for Water Pressure on the Fourth Floor of a Residential Building
Beginning on the 4th floor of such a building, install an additional pressure tank next to the second pump.
The ground floor pump will send water into the incoming pipe connection of your 4th floor pump itself.
We are assuming that your 4th floor pump will be a 1-line jet pump - that is, a single pipe connects to the pump inlet port and a single pipe connects from the pump outlet to the inlet connection of a pressure tank.
Fourth floor cold water piping should be fed by the outlet connection on the pressure tank. WATER PUMP, ONE LINE JET shows what a common 1-line jet pump looks like, and WATER PUMP, ONE LINE JET OPERATION explains how one line jet pumps work.
In our one line jet pump photo (left) the black plastic pipe coming up from lower left is attached to the pump's inlet port where an internal check valve prevents water from siphoning back out of the pump and tank into the well when the pump shuts down.
At the top right of this pump you can just make out the water connection leaving the pump where it heads up into a copper pipe.
The 4th floor pump will turn "on" when the pressure switch connected to its 4th floor pressure tank senses pressure dropping below the cut-in point, and it will cut "off" when the 4th floor pump has boosted pressure in your 4th floor tank up to the cutout pressure.
We expect that given that the 4th floor pump will have always at least some incoming water pressure, though low, it should be able to add additional lift t boost the 4th floor pressure as you want.
The "lift" capacity of a water pump that is a one-line jet pump is a little under 10 meters - but that's without any incoming pressure to the pump from the one located on the 1st floor.
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Thanks to reader Ahmed Hamza for discussing the use of water pressure booster pumps and the installation of water pumps in series to improve water pressure on upper building floors. Mr. Hamza is in Cairo, Egypt where although he is not a plumbing professional, he works work with Calpeda Pumps, an Italian company that produces a wide range of electric pumps, including self-priming pumps type NGM, single phase 230V. Calpeda S.p.A., Calpeda Group,
Via Roggia di Mezzo, 39 - 36050 Montorso Vicentino - Vicenza / Italy
Tel. + 39 0444 476 476 Fax. + 39 0444 476 477
E-mail: info@calpeda.it The company states: "Calpeda, a company leader in electric pump industry, is part of an industrial group that embodies metal materials foundries, companies producers of submersible bore hole pumps, a company operating in spa bath and shower industry and an IT company."
02/04/2010
Water Supply & Drain Piping, Wells, Pumps, Water Supply Equipment
Access Water Energy, PO Box 2061, Moorabbin, VIC 3189, Australia, Tel: 1300 797 758, email: sales@accesswater.com.au Moorabbin Office: Kingston Trade Centre, 100 Cochranes Rd, Moorabbin, VIC 3189
Australian supplier of: Greywater systems, Solar power to grid packages, Edwards solar systems, Vulcan compact solar systems, water & solar system pumps & controls, and a wide rage of above ground & under ground water storage tanks: concrete, steel, plastic, modular, and bladder storage tanks.
Cheating on water tests: Testing Water for Real Estate Transactions - make sure your water test is valid
Smart Tank, Installation Instructions [ copy on file as /water/Smart_Tank_Flexcon.pdf ] - , Flexcon Industries, 300 Pond St., Randolph MA 02368, www.flexconind.com, Tel: 800-527-0030 - web search 07/24/2010, original source: http://www.flexconind.com/pdf/st_install.pdf
Typical Shallow Well One Line Jet Pump Installation [ copy on file as /water/Jet_Pump_Grove_Elect_Jet_Pumps_1.pdf ] - , Grove Electric, G&G Electric & Plumbing, 1900 NE 78th St., Suite 101, Vancouver WA 98665 www.grovelectric.com - web search -7/15/2010 original source: http://www.groverelectric.com/howto/38_Typical%20Jet%20Pump%20Installation.pdf
Typical Deep Well Two Line Jet Pump Installation [ copy on file as /water/Jet_Pump_Grove_Elect.pdf ] - , Grove Electric, G&G Electric & Plumbing, 1900 NE 78th St., Suite 101, Vancouver WA 98665 www.grovelectric.com - web search -7/15/2010 original source: http://www.groverelectric.com/howto/38_Typical%20Jet%20Pump%20Installation.pdf
Water Fact Sheet #3, Using Low-Yielding Wells [ copy on file as /water/Low_Yield_Wells_Penn_State.pdf ] - , Penn State College of Agricultural Sciences, Cooperative Extension, School of Forest Resources, web search 07/24/2010, original source: http://pubs.cas.psu.edu/FreePubs/pdfs/XH0002.pdf
Water pressure tanks - how to diagnose the need for air, how to add air, stop water pump short cycling to avoid damage - water storage water pressure tank safety.
Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair
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The Home Reference Book - the Encyclopedia of Homes, Carson Dunlop & Associates, Toronto, Ontario, 2010, $69.00 U.S., is available from Carson Dunlop, and from the InspectAPedia bookstore. The 2010 edition of the Home Reference Book is a bound volume of more than 450 illustrated pages that assist home inspectors and home owners in the inspection and detection of problems on buildings. The text is intended as a reference guide to help building owners operate and maintain their home effectively. InspectAPedia.com ® author/editor Daniel Friedman is a contributing author. Field inspection worksheets are included at the back of the volume.
Crystal Clear Supply provides portable ceramic water filter purifiers and portable reverse osmosis water treatment equipment - see http://www.crystalclearsupply.com/category_s/7.htm
Handbook of Disinfectants and Antiseptics, Joseph M. Ascenzi (Editor), CRC, 1995, ISBN-10: 0824795245 ISBN-13: 978-0824795245 "The evaluation of chemical germicides predates the golden age of microbiology..." -
This well-focused, up-to-date reference details the current medical uses of antiseptics and disinfectants -- particularly in the control of hospital-acquired infections -- presenting methods for evaluating products to obtain regulatory approval and examining chemical, physical, and microbiological properties as well as the toxicology of the most widely used commercial chemicals.
Potable Aqua® emergency drinking water germicidal tablets are produced by the Wisconsin Pharmacal Co., Jackson WI 53037. 800-558-6614 pharmacalway.com
Principles and Practice of Disinfection, Preservation and Sterilization (Hardcover)
by A. D. Russell (Editor), W. B. Hugo (Editor), G. A. J. Ayliffe (Editor), Blackwell Science, 2004. ISBN-10: 1405101997, ISBN-13: 978-1405101998.
"This superb book is the best of its kind available and one that will undoubtedly be useful, if not essential, to workers in a variety of industries. Thirty-one distinguished specialists deal comprehensively with the subject matter indicated by the title ... The book is produced with care, is very readable with useful selected references at the end of each chapter and an excellent index. It is an essential source book for everyone interested in this field. For pharmacy undergraduates, it will complement the excellent text on pharmaceutical microbiology by two of the present editors."
The Pharmaceutical Journal: "This is an excellent book. It deals comprehensively and authoritatively with its subject with contributions from 31 distinguished specialists. There is a great deal to interest all those involved in hospital infection ... This book is exceptionally well laid out. There are well chosen references for each chapter and an excellent index. It is highly recommended." The Journal of Hospital Infection.: "The editors and authors must be congratulated for this excellent treatise on nonantibiotic antimicrobial measures in hospitals and industry ... The publication is highly recommended to hospital and research personnel, especially to clinical microbiologists, infection-control and environmental-safety specialists, pharmacists, and dieticians."
New England Journal of Medicine: City Hospital, Birmingham, UK. Covers the many methods of the elimination or prevention of microbial growth. Provides an historical overview, descriptions of the types of antimicrobial agents, factors affecting efficacy, evaluation methods, and types of resistance. Features sterilization methods, and more. Previous edition: c1999. DNLM: Sterilization--methods.
U.S. Army Field Manual 21-10, Field Hygiene and Sanitation, 1988, web search 07/02/2010, original source: http://www.enlisted.info/field-manuals/fm-21-10-field-hygiene-and-sanitation.shtml The purpose of this manual is to assist individual soldiers, unit commanders, leaders and field sanitation teams in preventing disease and environmental injuries. The manual provides information on preventive medicine measures (PMM) to the individual soldier as well as essential information for the unit commander, unit leaders, and the unit field sanitation team on applying unit level PMM.
When Technology Fails, Matthew Stein, Chelsea Green Publisher, 2008,493 pages. ISBN-10: 1933392452 ISBN-13: 978-1933392455, "... how to find and sterilize water in the face of utility failure, as well as practical information for dealing with water-quality issues even when the public tap water is still flowing". Mr. Stein's website is www.whentechfails.com/
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When incoming water pressure at a building is low, a water pressure "booster pump" may be installed on upper building floors or on a building roof to provide improved water pressure for the occupants of upper building floors.
