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This WATER PRESSURE PROBLEM DIAGNOSIS TABLE series provides a table giving step by step checklist for diagnosing water pressure, water pump, and water well problems. We give diagnostic and repair procedures for both municipal water supply problems and well water supply problems.
We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.
Table of Diagnostic Steps for Poor Water Pressure from a Pump & Well System
Checklist of water pressure problem diagnosis and repair steps. Well pump problem diagnostic checklist. Well water problem diagnostic checklist. Water pressure loss or poor water problem diagnostic checklist. How to diagnose loss of water pressure or loss of water in a building - both municipal water supply and private well systems are addressed.
Keep in mind that if water is running elsewhere in the building (another shower, sink, dishwasher, clothes washer, garden hose, etc) then the water pressure you will observe at your location will usually be reduced.
The Form M4 (low pressure cut-out feature) is only available on the Square-D 9013FSG & 9013FYG pressure switches.
Schneider Electric offers this additional detail about the low pressure cutoff feature included in these two pressure control switch models:
The low pressure cutoff remains fixed at 10 psi below the low pressure cut-in for the
pressure switch. Although it is not independently adjustable, it will follow the low pressure
set point. However, the pressure switch will not be effective if the cut-in point is set below
10 psi. - Op. Cit.
Pressure switch does not turn on in response to drop in water pressure:
Check for debris-clogged sensor port on the pressure switch diaphragm or mounting tube. Clean or replace these parts.
Check for burned pressure switch contacts.
Check for debris-blocked pressure switch contacts: mud dauber wasps, insects, crud in the switch can prevent its operation
Check for incorrectly-adjusted pressure control switch Differential or Range Nut Adjustments
Check for damaged pressure sensing diaphragm on the pressure control switch.
If you have been fooling with the pressure control switch settings they may be adjusted out of range.
If the pressure switch contacts are burned possible causes include:
Pump has been short cycling, burning and arcing the contacts
Pump draws excessive current due to motor size or due to incipient motor failure. If this is the case replace the switch with a heavier duty one or fix failing motor or if necessary install a separate heavy duty pump control relay with a higher rating.
Burned pressure switch contacts can be replaced in many pressure control switches.
A replacement parts kit typically includes a new set of contacts and a new pressure sensing diaphragm actuator.
Well Pump Keeps Running, Pump Will Not Shut Off
Common causes include:
Water is running or at the building
A water pipe or well piping is leaking
The pump is damaged and cannot reach cut-off pressure
The pressure control switch cut-off is set too high
Water level in the well is too low and a tailpiece is recycling water through the pump system
Pump has lost prime due to leak in well piping or a failed check valve or foot valve
If you have been fooling with the pressure control switch settings they may be adjusted out of range.
Less common causes:
Clogged pressure switch sensor port, not sensing increase in water pressure.
Worn pump impeller
Broken blade on pump impeller
Debris clogging at pump inlet or impeller
Debris clogging at pump outlet
Partly-closed valve or clogged water filter at pump outlet
Other worn pump internal parts
Damaged pressure sensing diaphragm on the pressure control switch
Watch out: a clogged sensor port or tubing at the pressure switch can delay the response of the switch to rising water system pressure and can cause the pump to run after it should have turned off. A safety hazard.
Well Pump Runs Intermittently for No Apparent Reason - no water running
Most common cause:
Slow water leak such as a running toile
Leaky check valve or foot valve in the well piping system causing loss of prime in pump & well piping
Debris-clogged pressure sensor port on the pressure switch or its mounting / sensor tubing can cause delayed sensing of a drop or rise in water pressure.
Watch out: a clogged sensor port or tubing at the pressure switch can delay the response of the switch to rising water system pressure and can cause the pump to run after it should have turned off. The resulting high water pressure in the system risks leaks or even a dangerous burst pressure tank or piping - not just a leak but a source of injury.
This sporadic or unexplained "on-cycles" of a pump is a different problem from a well or system that sometimes simply runs out of water. For that problem
see WATER PRESSURE INTERMITTENT LOSS
Pump Runs, shuts off immediately after start then runs again: Pump Chatter
Most common cause:
Pump capacity too high for water outlet
Clogged water filter or closed or mostly-closed valve at pump outlet
May occur when a new pump is installed especially if it's a higher horsepower than its predecessor.
Install a water pressure surge protector at the pump outlet. Schneider / Square-D offer these parts in quantity (PN 1530S6G1) but buy just one from your plumbing supplier.
These diagnostic suggestions include, expand, and adapte information from : "Preventive Maintenance and Troubleshooting Guidelines for Class 9013F and 9013G Pressure Switches" (2007), Original source: Schneider Electric USA 8001 Knightdale Boulevard Knightdale, NC 27545 USA 1-888-SquareD (1-888-778-2733) www.us.SquareD.com
To select the proper Square-D pressure control switch see to the Schneider Electric catalog Commercial Pressure Switches Types F and G Class 9013
(9013CT9701), Industrial Pressure Switches (9012CT9701), or Nautilus™ Electronic Pressure Sensors, XMLE, XMLF, XMLG (9014CT0201).
National Pump Company, "Betta Flo Jet Pump Installation Manual", National Pump Company, LLC., 7706 North 71st Ave.
Glendale, AZ 85303 Tel: (800) 966-5240, offices in the U.S. in Arizona, California, Florida, Georgia, Mississippi, Texas; Email: firstname.lastname@example.org, retrieved 1 April 2015, original source: http://www.nationalpumpcompany.com/pdf/betta_flo_iom_jet_pump.pdf
Tractor Supply Co., "CountryLine Cast Iron Jet Pumps Owners' Manual", Tractor Supply Co., 293 Wright Street, Delavan, WI 53115
Phone: 1-800-535-4950 Fax: 1-800-526-3757 Web Site: tractorsupply.com, retrieved 1 April 2015, original source: http://www.tractorsupply.com/ProdContentPDFs/1028145_Man1.pdf
Notes: Some of the well pump troubleshooting suggestions in this list can be found at the Betta-Flo Jet Pump Installation Manualfrom the National Pump Co.
Questions & answers or comments about how best to diagnose the cause of poor building water pressure or lost water pressure.
Use the "Click to Show or Hide FAQs" link just above to see recently-posted questions, comments, replies, try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly.
Mark Cramer Inspection Services Mark Cramer, Tampa Florida, Mr. Cramer is a past president of ASHI, the American Society of Home Inspectors and is a Florida home inspector and home inspection educator. Mr. Cramer serves on the ASHI Home Inspection Standards. Contact Mark Cramer at: 727-595-4211 mark@BestTampaInspector.com
John Cranor is an ASHI member and a home inspector (The House Whisperer) is located in Glen Allen, VA 23060. He is also a contributor to InspectApedia.com in several technical areas such as plumbing and appliances (dryer vents). Contact Mr. Cranor at 804-747-7747 or by Email: email@example.com
Thanks to Jeneral Sewer Service - George - 845-297-2285, a New York Hudson Valley drain and sewer cleaning and de-clogging expert for technical details and consulting on drain clog diagnosis and repair, including proper use of the Kinetic Water Ram for drain clearing - 3/14/2009
Thanks to our reader, Carole Cimitile, 2/17/2009, for reminding us that small problems like faucet o-rings, clogged faucet strainers and similar local plumbing fixture defects can have a big impact on hot water flow, cold water flow, or both hot and cold water flow and pressure problems.
Thanks to reader EK Woodard, Boise State University, Boise ID, for assistance in diagnosing poor water pressure following an electrical power loss.
Betta-Flo Jet Pump Installation Manual, National Pump Co., LLC., includes helpful well pump troubleshooting tips as well as basic jet pump installation details. Web search 07/24/2010, original source: http://www.nationalpumpcompany.com/Documents/OIM/Betta%20Flo%20IOM%20Jet%20Pump.pdf
Access Water Energy, PO Box 2061, Moorabbin, VIC 3189, Australia, Tel: 1300 797 758, email: firstname.lastname@example.org 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.
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.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
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/
Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair
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