Well Tank / Water Tank Repairs
Water Pressure Tank / Water Tank Diagnosis & Repair for Air Charge, Water Tank Leaks, Rust, Corrosion, Sweating

  • WATER TANK REPAIR PROCEDURES - CONTENTS: How to diagnose & repair water tank or water pressure tank problems. Well pump & water tank diagnosis & repair procedures - do I need a new water tank or well tank?
  • POST a QUESTION or READ FAQs about well water tanks: types, diagnosis, installation, repair, & replacement of water pressure tanks

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Water tank repair or replacement guide: The water tank troubleshooting article series beginning here describes how to determine if you need to replace the water pressure tank.

Synonyms for water pressure tank include: water tank, water storage tank, well tank, pressure tank, pressure control tank, Extrol, WellXTrol, bladder tank, bladderless water tank.

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Water Pressure Tank Diagnosis & Repair Advice

Severely rusted leaky water pressure tank needs replacement, not repair (C) Daniel FriedmanShort cycling of a water pump which is defined
at SHORT CYCLING WATER PUMP means that the water pump or "well pump" turns on and off too rapidly or too frequently when water is being run in the building.

[Click to enlarge any image]

If this is the problem with your water pump,
describes the most common causes of this problem.

We also provide a complete
that lists all possible causes of well pump rapid cycling on and off.

If you are not sure what "water pump short cycling" means or how it is recognized, read SHORT CYCLING WATER PUMP.

Intermittent water pump cycling which is discussed
at WATER PUMP INTERMITTENT CYCLING when the water pump comes on for no apparent reason.

Loss of water pressure means that the pressure with which water enters a plumbing fixture has become too slow, or is sometimes too slow or weak in water flow rate, or water flow may stop entirely.


Water tank leaks: repairs for water leaking out of the water tank depend on where and why the leak is occurring. Leaks at threaded fittings might be repairable by draining the system, disassembly, cleaning and drying the parts, and re-assembly with an appropriate pipe sealant or in some locations teflon tape.

Other leaks due to rusting, perforating water tanks can be patched temporarily but you should expect to replace the water tank as soon as possible. That's because corrosion in a water tank usually occurs from the inside out and will be more serious than what you see on the tank exterior.

Watch out: poking at or messing with what seems to be a tiny leak in the surface of a water tank, because the steel is probably rusted thin, risks converting the problem to an instant catastrophe and flood.

Steel Water Tank Rust Perforation & Emergency Tank Repairs

Photograph of a steel water tank Photograph of a steel water tank

This steel water storage tank is leaking. When you see damage like this on a water tank, the perforation has rusted through from inside the tank. A tank that looks like this needs to be replaced.

Watch out: don't poke at rust like this on a water tank - you are likely to change a slow seep or drip into an immediate catastrophe - the steel around the site of rust perforation is usually quite thin.

Emergency temporary repairs to a leaky Water Tank

Water tank repair bolt (C) Daniel FriedmanIf the rust perforation on a steel, bladderless water pressure tank is very tiny, 1/8" or so, temporary repair can sometimes be made using a special short lag-type threaded screw with a neoprene washer. Leak repair screws are sold for this use.

In an emergency you can even fabricate one of these water tank leak repair lag bolts, as we did for our photo (left).

We used a 3/4" long lag screw and a thick neoprene washer that happened to be around. If you buy a factory-made version of this device the washer is designed to seat and seal against the curved surface of the leaky water tank.

Watch out: because the steel will be thin around the rust spot, you may find that you need a larger screw than you thought, or bought.

We recommend buying several sizes of water tank repair screws, but start by using the smallest one that will be secure when screwed all the way in to the tank.

Just blob on some sealant to stop a leaky water tank?

A second type of water pressure tank repair that might work in some locations is the use of quick-setting epoxies, caulks, sealants, including those that can work in wet conditions. Details are at CAULKS, NONTOXIC

You still need to replace the water tank but this approach can stop or slow a leak while you wait for the new tank to be installed.

This approach would not work on the horribly rusted water tank shown above - that one is just too far gone.

Water Tank Leaks Leak Water Out or Air Out, depending on the Leak Location

Leaks like the ones in the above photos can also leak the air charge out of the upper portion of the tank when the in-tank water level is below the leak point. A water pump short cycling problem could be due to an air loss in the tank to a leak in the tank itself.

Life Expectancy of Water System Components


Continue reading at WATER TANK PERFORATION LEAK REPAIR or select a topic from the More Reading links shown below.


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WATER TANK REPAIR PROCEDURES at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

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