Water pressure tank or water storage tank diagnosis & repair questions & answers:

This article series describes how and why to diagnose problems right at the water tank in order to help distinguish among intermittent water pressure loss, total water pressure loss, and poor water pressure or flow in a building.

FAQs on How to Diagnose & Fix Water Pressure Tank Problems

The questions & answers about water tank diagnosis & repair were posted originally

at WATER TANK DIAGNOSIS & REPAIR - topic home. Please be sure to see the diganosis and repair advice given there.

My water tank system pumps up to 50psi and then bleeds down to 45psi in half an hour.

My system pumps up to 50psi and then bleeds down to 45psi in a matter of half an hour. I looked for leaks and only found that the air valve on the storage tank show a small leak using soapy water.

Any clues? Where can I find a new air valve for my tank?

The storage tank should be empty when checking the charge. The charge should be 28psi. On 2017-04-08 by Dave

Reply by (mod) -

Dave:

Does the pressure drop STOP once the gauge says 45 psi? Could the gauge be debris clogged?

Air or pressure gauges used on water pressure tanks are standard and easily replaced. Any plumbing supplier has them.

Air valves - used for adding air to a tank, use a standard internal valve stem or core, but the valve itself may be customized to fit the tank depending on the tank type and model.

A steel bladderless pressure tank may use a conventional air valve (Schrader valve) that's available at any plumbing supplier.

A water pressure tank using an internal bladder may use a special rubber-based air valve that is supplied by the tank manufacturer and that might be replaceable.

Signs that the Well pump stops working - pressure variations

My holding tank is only running around 20lbs of pressure. If I turn the 30amp breaker off for a while and then back on it will rise to around 50 and slowly drop back down to 20. What is the problem? On 2017-04-07 by Adam

by (mod) - signs of a pump motor problem

Sounds to me like a pump motor problem, perhaps lack of water and overheating motor.

by Adam

It started around the same time it started raining?

How fast is "rapid cycling" or pump short cycling?

I have a small pressure tank and expect that the pump will have to turn on and off, but when is it cycling too fast? How many seconds should it run before kicking off and then restarting? On 2017-03-26 by Anonymous

by (mod)

How fast is "rapid cycling" or pump short cycling? good question.

IT depends on tank size, and more, on the water outflow or usage rate, and also the pump's pumping rate capacity in gpm for the whole system including total vertical lift, piping restrictions & distances.

If a pump, tank, piping, well are in perfect condition and the pump is cycling on and off for a moderate water flow usage rate such as someone running a bathroom sink faucet, then if the pump is turning on and off more often than every 30 seconds I'd want a larger pressure tank.

The pump manufacturers, are, however the final authority on this so you'll want to check with the company who makes your tank.

Certainly if a pump under any circumstances is turning on and off every few seconds or less, something's seriously wrong and the pump or its controls are likely to be damaged or to have a short life.

For pressure boosting pumps that do not use any pressure tank (the control that turns the pump on and off is built into the pump), the pump turns on as soon as a plumbing fixture is opened to run water and runs all the time water is being run.

Watch out: with tankless booster pumps: any small leak such as a running toilet or pinhole leak in a pipe may cause the pressure booster pump to cycle on and off more frequently than the manufacturer intends - risking damage to the pump.

There's no air in my water pressure tank - what's wrong?

I checked my air pressure of my pressure tank and no air came out , what is the problem. On 2017-03-20 by John

by (mod) - signs of a waterlogged pressure tank

The tank is probably waterlogged, or it's at zero pressure.

You might want to use the search box just above to search InspectApedia for WATER TANK AIR PRESSURE SETTING to find a helpful diagnose and repair sequence

I suddenly have no water.

suddenly have no water. have a inground concrete tank with pressure tank in it . have a control box on the wall of this tank. intermittent beeping sound can be heard. any ideas where to start? On 2017-02-17 by Jan

by (mod) - sudden loss of water pressure

Search InspectApedia for NO WATER PRESSURE to see some helpful diagnostic and repair steps, Jan

Well Pump makes hammering noise when it shuts off

We have well water that sometimes when the pump cycles it hammers at shut off.

Plus i did shake the pressure tank like some articles say to do it caused brown water to all the fixtures in the house which I had to clean out to get any flow. So why dose it hammer? On 2016-12-28 by Kim

by (mod) hammering sound when pump cycles off

Kim

Please search InspectApedia.com for WATER HAMMER to read about the causes and cures for this problem. Let me know if after that you need more help.

 

Water tank is getting too much air pressure

well tank keeps getting over pressurized with air On 2016-11-29 by mike

by (mod) water tank keeps getting over-pressurized

Mike:

Look for an air volume control system that's not working properly. For example the Snifter valve system on older bladderless pressure tanks and used with submersible well

pumps uses an in-well air admittance valve and an aboveground excess air bleeder valve - either of which could be present and malfunctioning or even not needed if a new bladder type pressure tank was installed.

Use the search box on this page to find our article on SNIFTER VALVES to read details.

A leak in the internal bladder of a pressure tank that uses bladders can also result in increasing pressure in the system.

Dirt comes in our well water

I'm getting dirt into our home from the drilled well. The well is 75' deep, the well pump was raise 10' a few years ago because the dirt was coming into the home.

When they drilled the well there was only a ten foot plastic casing pipe pushed down into the well hole. Is there anything that can be installed to filter out the dirt out before the pressure tank?

Can the well be re drilled and push down more casing into the well.

Problem is I have aerator tank that's installed before the pressure tank, and the head is getting dirt in it.

I also can tell dirts coming because I have a whole house water filter that has little dirt that's left after the filter system backwash's every four days. On 2016-08-30 by Mike

by mod - dirt into our home from the drilled well

Mike

Yes there are dirt filters of various types and capacity that you can install to filter out dirt ahead of the pressure tank.

The filter selection needed depends in part on the type of soil. For example fine clay will require a small particle filter and probably a large capacity so you're not changing the filter every few days.

See if a local well or plumber expert has a camera that allows inspection of the well bore: check for casing cracks, holes, damage that might be sending extra soil into the well.

Search InspectApedia for WATER FILTERS to read more about that solution.

I put in a new water tank and our water pressure increased but now we have air int he lines

I recently replacde an old pressure tank with a pressurized new one. All was well but we wanted more pressure in the house.

I had a 30/50 pressure switch so I replaced it with a 40/60.

We got a nice increase in pressure, however, now we get a major amount of air in the lines that is not getting better.
any suggestions On 2016-08-25 by ron

by (mod) changing a pressure tank will not increase the water pressure in a home.

Ron

Unfortunately changing a pressure tank will not increase the water pressure in a home.

At most it might give a longer draw-down before the pump has to turn-on. It's the pump's capacity that, along with the pressure switch setting, delivers water pressure. That's why the new switch gave you better in-house water pressure.

Now to the air: either the pump is exceeding the flow rate of the well OR there is a leak somewhere in the piping OR the well uses an old snifter valve (search InspectApedia for that term) that should have been removed.

You'll want the diagnosis and repair help at

AIR DISCHARGE at FAUCETS, FIXTURES 

Problem with noise and rapid cut-out of Davey water pump

I have a Davey set up it has for last 6 months or more started to get real noisey and I counted over ten times it cut in and out for misses to shower On 2016-08-12 by Mick love

by (mod)

Rapid cut-in-cut-out is a problem for which we have lots of diagnostic and repair information. See the ARTICLE INDEX found near the end of this page or search InspectApedia.com for

• WATER PUMP SHORT CYCLING - home

to see details.

Water pressure tank won't hold its air charge

I add air to the pressure tank but it looses the air after a while is the tank bad On 2016-07-30 by Anonymous

by (mod) - why adding air to the pressure tank may be needed

Anon it depends on how long it takes for the tank to lose its air charge, and how much water is being used in that interval.

If your system has a tank that uses an internal bladder you should never need to add air - so that'd be a bad tank;

If your water tank does not use an internal bladder it may need a replacement Air Volume Control or AVC device.

What's the recommended water pressure for our home?

What is recommended water pressure for 5 bedroom 3 bath? We are having problems with water pressure tank 40 gallon set at 40 psi On 2012-09-21 by Heidi

Reply by (mod) -

Heidi,
Let's not confuse pressure with flow rate. Typical home water system pressure control switches (presuming this is a private wellmsystem) cut in at 20 or 30 psi and cut off at 40 or 50 psi. If flow is inadequate there may be a clogging problem.

Water pressure falls way off if our sprinklers are on

Our water pressure drops significantly if the water sprinklers and any other source of water is running. This has never happened before. In the past we could run the dishwasher, washing machine and still take a shower with good water pressure.

Now if more than two things are running, there is not enough pressure to run the shower or anything else, just drops come out. The change seems to have happened rather quickly and not gradually over time. I'm assuming something is wrong with our water pump. We have a well and the pump is about 12 years old. Any idea what the problem could be? On 2012-06-30 by Scott

Reply by (mod) -

Scott, you can start diagnostic procedures using the link WATER PRESSURE LOSS DIAGNOSIS & REPAIR found near the end of this page. I agree that the suddenness of a change in system pressure delivery is a helpful clue - could be a damaged pump impeller?

We have sediment in our water and our water flow is intermittent

I am on a well and also have a water filtration system that back washes every 3 days. In general, the water pressure is good. but recently, when using the water, it seems like the water flow is intermittent, where the water from the sink or shower flows very good then slows, then flows good again in about every 5 second cycles.

The area where I live has not seen rain for quite a while and I am not sure if this may have something to do with this behavior. Any thoughts here as to the possible problem/solution - thanks? On 2011-09-04 by Matt

Reply by (mod) -

Matt:

Your setup is using a lot of water (for baackwash in addition to normal use); if your water pressure tank is an older steel bladderless type, it's possible that all that activity has lost the air charge in the tank.

Take a look at the well pump short cycling and water tank air addition procedures in articles listed under
WATER TANK REPAIRS (article link at page left)

Our shallow well pump can't get over 10 psi

We have a shallow well pump that, at the pump, still has a little pressure. (hovering around 10PSI). Even when the pump is off, if I take the little screw out, water comes shooting out the top. It will not come out of any of the faucets, however, and I'm confused.

Even with the low pressure at the pump, how can it shoot out there and not even produce a drop at a faucet? How do I get the pressure back up? On 2011-08-16 by Erik R.

Thanks.

Reply by (mod) -

Erik,
I'm not sure what screw you are removing, and if your system is actually losing all functional pressure you might still see pressure on a gauge if it's sticking, and water squirting out of a pressure tank by gravity or even by very low pressure in the tank that is just not enough to push water up to higher levels in a building, say from a basement to an upper floor.

I'd go back to WATER PRESSURE PROBLEM DIAGNOSIS TABLE and start diagnosing the low water pressure problem: is it the well, the pump, or the controls. ?

Squealing water pressure tank

Water pressure tank makes extreme squeeling noise as the pressure builds up to the shut off pressure of 50 PSI On 2011-08-08 by Bob P

by (mod) -

Bob I'm not sure what's going on either - a squealing water pressure tank sounds like air or more likely water passing through a restricted valve or pipe clog. I have heard a high pitched shriek or whine during fill-ups of water tanks whose water level is controlled by a float. In that case the noise seems to come from a combination of stick float mechanism that may not fully open the fill valve and thus a partial restriction in the water line.

You might also want to see our comments under plumbing noises - click on ENVIRONMENT (page top links) then NOISE / SOUND DIAGNOSIS & CURE

...

Continue reading  at WATER TANK DIAGNOSIS & REPAIR - topic home, or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

Or see WATER TANK DIAGNOSIS & REPAIR FAQs-2 - more-recent questions and answers about water pressure tank troubleshooting and repair

Or see these

Recommended Articles

• WATER TANK REPAIR PROCEDURES - how to fix problems with the water pressure tank
• WATER PRESSURE PROBLEM DIAGNOSIS TABLE
• WATER PUMP SHORT CYCLING
• WATER PUMP CONTROLS & SWITCHES - home
• WATER TANK AIR VOLUME CONTROLS - home
• WATER TANK vs WATER PRESSURE

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

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INDEX to RELATED ARTICLES: ARTICLE INDEX to WATER SUPPLY, PUMPS TANKS WELLS & SPRINGS

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