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WATER PUMPS, TANKS, TESTS, WELLS, REPAIRS

AIR DISCHARGE at FAUCETS, FIXTURES
AIR INLET VALVE, WATER TANK
AIR VOLUME CONTROLS, WATER TANK

BIOLOGICAL POLLUTANTS
Bisphenol-A, BPA

CHEMICAL CONTAMINANTS in WATER
CHECK VALVES
CHLORAMINE / CHLORINE Tests
CHLORINE IN DRINKING WATER
CHLORINE in WATER, HOW TO TEST FOR

CISTERNS

DEBRIS in WATER SUPPLY, Water Heater
DRINKING WATER TESTING

DRINKING WATER - EMERGENCY PURIFICATION
DRINKING WATER - EMERGENCY SOURCES

EPA GUIDE to WATER QUALITY

FHA WATER TESTS REQUIRED

FILTERS, WATER
FLOW CONTROL VALVES
FOOT VALVES, WELL PIPING

GALVANIC SCALE & METAL CORROSION
GREYWATER SYSTEMS

HARD WATER - SOFTENERS
HEAT TAPE USAGE GUIDE

LEAD POISONING HAZARDS GUIDE
Legionella Legionnaires' Disease

METHANE GAS SOURCES
MVOCs & MOLDY MUSTY ODORS
MSDS Material Safety Data Sheets
MUNICIPAL WATER PRESSURE IMPROVEMENTS

ODORS GASES SMELLS, DIAGNOSIS & CURE
ODORS IN WATER
OZONE HAZARDS

Pesticide Exposure Hazards

PIPING IN BUILDINGS, Clogs Leaks Types
PLASTIC CONTAINERS, TANKS, TYPES
PLUMBING SYSTEM ODORS
PRESSURE CONTROL SWITCH ADJUSTMENT

RADON HAZARD TESTS & MITIGATION

RELIEF VALVES - Water Tanks

REVERSE OSMOSIS CONCENTRATE DISPOSAL

SEWAGE PATHOGENS in SEPTIC SLUDGE
SEWER GAS ODORS

TANK TYPES: WATER, OIL, EXPANSION, ALL

VALVES, PLUMBING

WATER CONTAMINANT LEVELS
WATER FILTERS
WATER HAMMER NOISE DIAGNOSE & CURE

WATER HEATERS

WATER ODORS, CAUSE CURE

WATER PRESSURE & FLOW MEASUREMENT
WATER PRESSURE LOSS DIAGNOSIS & REPAIR
WATER PRESSURE REPAIR GUIDE - WELLS

WATER PUMPS, TANKS, TESTS, WELLS, REPAIRS
WATER PUMPS, TANKS, WELLS - BASICS

WATER PUMP CAPACITIES TYPES RATES GPM
WATER PUMP CONTROLS & SWITCHES
WATER PUMP PRESSURE CONTROL SWITCH
WATER PUMP TYPES & LIFE EXPECTANCY
WATER PUMP PRIMING PROCEDURE
WATER PUMP PROBLEM DIAGNOSTIC TABLE

WATER PUMP REPAIR GUIDE
WATER PUMP SHORT CYCLING
WATER PUMP WONT STOP RUNNING

WATER PURIFIERS

WATER QUALITY TESTS, CONTAMINANTS, TREATMENT
WATER QUANTITY IMPROVEMENT

WATER SHUTOFF VALVE LOCATION, USE
WATER SHUTOFF VALVE, WELL PUMP

WATER SOFTENERS & CONDITIONERS
WATER SOURCE ALTERNATIVES

WATER TANK: USES, TROUBLESHOOTING
WATER TANK AIR, HOW TO ADD
WATER TANK AIR INLET VALVE
WATER TANK AIR LOSS SIGNS
WATER TANK AIR VALVE REPAIRS
WATER TANK AIR VOLUME CONTROLS
WATER TANK BLADDERS & CAPTIVE AIR
WATER TANK CAPTIVE AIR vs TRADITIONAL WellMate

WATER TANK CONTROLS & SWITCHES
WATER TANK LIFE EXPECTANCY

WATER TANK PRESSURE CALCULATIONS
WATER TANK PRESSURE GAUGE
WATER TANK PRESSURE RELIEF VALVE

WATER TANK REPAIRS
WATER TANK REPLACEMENT

WATER TANK SAFETY
WATER TANK SIZE & VOLUME

WATER TANK TYPES: WATER, OIL, EXPANSION, ALL

WATER TESTS, CONTAMINANTS, TREATMENT
WATER TEST CHOICES & WATER TEST FEES
WATER TESTING GUIDE
WATER TEST INTERPRETATION

WATER TREATMENT EQUIPMENT CHOICES

WELL PUMP PRIMING PROCEDURE

WELLS CISTERNS & SPRINGS

WINTERIZE A BUILDING

More Information

Photograph of a water system check valve Water System Check Valves
InspectAPedia®  -    

  • Where do we find the water system check valve (if any) and why are check valves used on pump and well systems?
  • Why a check valve is needed on a water supply inlet pipe - avoiding back-contamination of water piping
  • Well pump & water tank check valve diagnosis & repair procedures
  • Questions & answers about plumbing water supplyi system check valves

Check valves on water supply systems: requirements, location, installation, troubleshooting & repair guide.

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This article answers the question: where do we find the water pressure tank drain valve on a private well, tank, and pump system, how is it used, how to repair leaky valves Readers of this document should also see Water pump and pressure tank repair diagnosis & cost an specific case which offers an example of diagnosis of loss of water pressure, loss of water, and analyzes the actual repair cost.

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WATER WELL, PUMP, & TANK CHECK VALVES

Photograph of a water system check valve

A check valve may be installed between the incoming water line from the well and the water pump and pressure tank, such as shown in this photograph.

You can see the check valve as a bronze assembly connected to the well piping just before the well water line passes through the white foundation wall in the right side of this photo. (After the check valve we see an poorly connected electrical ground wire also clamped to the piping.)

You'll notice that this is a (green) one-line jet pump system. (You can see the single pipe running from the foundation wall to the front of the green jet pump). The check valve helps avoid loss of prime and thus helps assure that the jet pump can suck water out of this shallow well.

The valve prevents water from siphoning back out of the water tank and water pump and down into the (presumably lower) water well when the pump stops running. A check valve at this location is a great idea and reduces the risk that a failure of the foot valve down in the well leads to inability of the pump to draw water.

The foot valve s located at the bottom of the well piping and intended to accomplish the same thing.

This is "cheap insurance" or perhaps the foot valve has already failed (or was omitted) at this installation.

You may see check valves installed on municipal water supply piping too, to prevent possibly unsanitary water from inside a building's piping from back-flowing into and contaminating the municipal water supply system piping during a time of loss of municipal water pressure. Check valves installed at the right location on water system piping are a good idea.

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Use links just below or at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website.

WATER PUMP CONTROLS & SWITCHES
  IDENTIFY WELL PUMP TANK COMPONENTS
  CHECK VALVES
  MAIN WATER SHUTOFF VALVE
  WATER PUMP ELECTRICAL SWITCHES
  WATER PUMP PRESSURE CONTROL
    PUMP PRESSURE CONTROL ADJUSTMENT
    PUMP PRESSURE CONTROL REPAIR
    PUMP PRESSURE CONTROL REPLACE
  WATER PRESSURE REDUCER / REGULATOR
  WATER PUMP RELAY SWITCH
  TANK AIR VOLUME CONTROLS
  WATER TANK AIR INLET VALVE
  WATER TANK PRESSURE GAUGE
  WATER PRESSURE GAUGE ACCURACY
  WATER TANK DRAIN VALVE
  WATER TANK RELIEF VALVE
  CHECK VALVES

Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair

  • Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. Also see our Book Reviews - InspectAPedia.
    • Home Reference Book - Carson Dunlop 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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