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WATER PUMPS, TANKS, TESTS, WELLS, REPAIRS
WATER CONSERVATION MEASURES
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 CHLORINATION & DISINFECTION
WELL FLOW RATE
WELL WATER PRESSURE DIAGNOSIS
WELL YIELD IMPROVEMENT
WINTERIZE A BUILDING
This article describes the location, use, and operation water tank pressure gauges, how to read, use, repair or replace water pressure gauges. We discuss water pressure gauge location, accuracy, and uses on water well pump and tank systems. A well pump gauge can help diagnose a variety of well and pump problems including leaks, bad check valves, bad well pumps and more.
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In this photo the water tank pressure gauge is visible mounted on a special brass fitting which is in turn connected to the bottom of the water pressure tank.
The water tank pressure gauge is showing about 37 PSI.
Note that water tank pressure gauges give a general idea of the water pressure measured at the water tank, and that the pressure shown on the gauge will normally drop down to the "pump cut-in pressure" at which point the water pump should start operating, and the gauge pressure will then rise up to the pump "cut out pressure" when the water pump stops.
Water Pressure Indicator Gauge Accuracy
Typical residential water system pressure gauges found at the water tank or water pump are only approximate and are not lab instrument grade, but the water pressure gauge is a very helpful diagnostic when you're diagnosing a loss of water pressure or pump operating problem as well as when you're adding air to a water tank. See WATER PRESSURE GAUGE ACCURACY for details.
How to Repair or Replace the Water Pressure Indicator Gauge on a Water Tank or Pump
The text below describes the steps in replacement of a broken or leaky or otherwise defective water pressure gauge. If you are installing a new pressure gauge where none has been previously installed, or for more water pressure gauge mounting location options see WATER PRESSURE GAUGE INSTALLATION.
How to Replace a Broken Water Pressure Gauge, or How to Correct A Water Pressure Gauge that Reads too High or Too Low
If the water pressure gauge glass is broken or missing, if the gauge is visibly rusty or damaged, or if the gauge simply stops changing what it indicates despite the water system pressure changing (in other words the pressure shown on the gauge never changes) you should replace the gauge itself.
The well pump is turned off, pressure is drained from the system (you do not have to let all of the water out of the tank, just be prepared for a little spillage). Then the new water pressure gauge is prepared for installation (make sure the gauge bottom threads match those of the old unit being replaced as diameters vary from 1/4" to 1/2").
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Frequently Asked Questions (FAQs) about water pressure gauges used on water tanks, wells, water supply systems and similar equipment
Questions & answers or comments about finding, using, diagnosing, repairing, or replacing water pressure gauges on private well systems.
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