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WATER PUMPS, TANKS, TESTS, WELLS, REPAIRS
WATER CONTAMINANT LEVELS
WATER HAMMER NOISE DIAGNOSE & CURE
WATER ODORS, CAUSE CURE
WATER PUMP REPAIR GUIDE
WATER PRESSURE LOSS DIAGNOSIS & REPAIR
WATER PUMP SHORT CYCLING
WATER SOFTENERS & CONDITIONERS
WATER TANK REPAIR PROCEDURES
WATER TANK: USES, TROUBLESHOOTING
WATER TESTS, CONTAMINANTS, TREATMENT
WATER TREATMENT EQUIPMENT CHOICES
WELLS CISTERNS & SPRINGS
WELL FLOW RATE
WELL WATER PRESSURE DIAGNOSIS
WELL YIELD IMPROVEMENT
WINTERIZE A BUILDING
This article describes How to restore lost air in a building water pressure tank using a garden hose and gravity in a building water supply system where a private well is the water source. This procedure is used as a simple means to correct water pump short cycling when the cause is a water-logged water tank.
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USE GRAVITY - Method 3: How to Use Gravity to drain the water pressure tank and then to let air into it
Here we explain a most basic way to get the proper air charge back into the water pressure tank and thus to stop well pump short cycling. This article also provides a second procedure for cases in which the water pressure tank is already working normally but wants fine-tuning of its air pressure - at Alternative procedure for water tank air pressure
Bladderless Steel Water Pressure Tanks can lose their air charge over time and may need air added by any of several methods described beginning at WATER TANK AIR, HOW TO ADD.
Bladder type or "captive air" water tanks do not normally need to have makeup air added, and water pressure or short cycling problems with bladder-type water tanks are usually traced to a failure of the bladder itself - a component that may be replaceable. See WATER TANK BLADDERS & CAPTIVE AIR.
Rocking the water pressure tank: (Gently) If the water-containing rubber bladder in a "captive air" water tank is defective (it can become stuck to itself and remain collapsed), the result can be a rapid on-off short cycling of the water pump. We test water pressure tanks to see if they're empty or nearly empty of water by seeing if we can rock or move the tank. If the tank is heavy with water it does not move easily. Be careful not to jiggle and break a pipe! Bladder type or captive-air water pressure tanks and their repairs are described just above and in more detail at WATER TANK TYPES.
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. The illustration at page top is courtesy of Carson Dunlop, Inc. in Toronto.
Here is a step by step method to add air to a water tank to stop short cycling of the pump.
You'll need a garden hose. That's about it, but read all of these instructions through before starting this project
The procedure just below is most suitable for a bladderless steel water pressure tank.
This alternative method for fine-tuning the air pressure setting in a water pressure tank was suggested by reader Mark Caruso. CONTACT
Watch out: The water tank air pressure adjustment described below is only suitable if your water tank is already working normally and if there is no evidence of a waterlogged pressure tank, significant water pressure tank air loss, or a SHORT CYCLING WATER PUMP.
Note that adjusting the water tank air pressure is not a substitute for adjusting the water tank pressure control switch discussed at WATER PUMP PRESSURE CONTROL ADJUSTMENT. The pressure control switch sets the cut in and cut out pressures of the water supply system. The proper volume of air in the pressure tank avoids short cycling of the water pump as we discuss beginning at SHORT CYCLING WATER PUMP.
Mr. Caruso's alternate idea for fine-tuning a non-waterlogged water pressure tank air charge includes these four simple steps:
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Frequently Asked Questions (FAQs)
Question: hissing sound coming from my well
There is a hissing sound coming from my well, and the submersible pump is brand new, and the power is turned off to the well pump. What is causing this? - Candace Hanscom 11/25/11
Candace, hissing may be air being vented inside the well from a snifter valve. We explain the snifter valve at WATER TANK AIR VOLUME CONTROLS - or you can search InspectAPedia for "How to Find & Repair the Water Tank Air Volume Control Device" to read more about that device.
Question: my bladderless water tank becomes waterlogged quickly after draining
I have a bladderless tank which rapidly becomes waterlogged after draining. I drain it completely using a hose (the tank is placed very high) - that is, until no more water comes out (and I have opened house faucets to let air in). Immediately after this, the short-cycling is much better (pump running 15 seconds not 1 second) but within a day short cycling starts again. I suspect I have water trapped in the tank but I'm reluctant to remove the top plug from the tank in case I damage things. No Schrader on the tank. Paul Adams 5/14/12
Questions & answers on the procedure for adding air to a water pressure tank by draining the tank using a garden hose.
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Technical Reviewers & References
Related Topics, found near the top of this page suggest articles closely related to this one.