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One Line Jet Pump (C) Daniel Friedman Intermittent Loss or Poor Water Pressure - Table 2 FAQs
Q&A on how to troubleshoot running pump but no water, weak water pressure, or periodic loss of water pressure

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This WATER PRESSURE PROBLEM DIAGNOSIS TABLE series provides a table giving step by step checklist for diagnosing water pressure, water pump, and water well problems.

We give diagnostic and repair procedures for both municipal water supply problems and well water supply problems.

We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.

Q&A on Diagnostic Steps for Poor Water Pressure from a Pump

These questions & answers about how to diagnose periodic or intermittent loss of water pressure were posted originally at TABLE 2: PUMP RUNS, WEAK or NO WATER PRESSURE - a table listing things to check: be sure you try the advice given there.

On 2019-01-09 by (mod) - plenty of water but pump pressure poor

I would check the voltage being delivered to the pump, the current draw of the pump, and if those look normal I might check the pump impeller for damage and the bearings for overheating.

On 2019-01-09 by Annie

Its coming out of a large dam with plentiful water

On 2019-01-09 by (mod) -

Sounds as if your pump out rate exceeds the rate of water flowing into your well - your well is being exhausted.

On 2019-01-09 by Annie Calder

Our farm pump system with a foot valve at the end of the suction line to a Davies pump is playing up.

Pump has been serviced and pumping well, but after working for a short time the water pressure on gauge drops right down and there is a very low volume of water coming through, so troughs take ages to fill.
Any idea why this is??

On 2018-09-27 by (mod) - pump won't lift water

Sam I'm flying a bit blind here but if the motor runs and the impeller is fine but the pump moves no water I suspect either lost prime or an air leak.

Or of course the source could be out of water.

On 2018-09-27 by sam

Hi,
i have got a diesel powered 3 inch southern cross pump that will pump 700 meter but wont pump it up in to a tank at the end of the line.
It has been working fine for the past 6 month, then all of a sudden it stops, i have pulled impellor off and it is fine no blockages.

On 2018-05-18 by (mod) - bad water pressure at just some fixtures

When you have water pressure at some fixtures but not others, or have hot pressure but not cold pressure, then the problem is not the pump but more likely a blocked or closed valve or section of piping.

On 2018-05-18 by georgeann selander

the pump was replaced about 6 weeks ago. but washer will not fill up but water still drips in washer. and at times no cold water in bathtub..

On 2018-04-19 by Shajan Xavier

Sir my pump centrifugal petrol engine starts and run ok but flows water low ? In last three days e engine sound is more , when accelerating at the same time pressure is ok idling time engine misfiring

On 2018-04-14 by (mod) - pump doesn't turn on when pressure drops

IF the pump doesn't turn on when pressure drops below the cut-in pressure I suspect the pressure switch is clogged with debris or otherwise defective.

see

On 2018-04-14 by Shelly

Pump has 30 pressure then drop to 0.

On 2018-02-24 1 by Devin khan

Power wiring for pentax water pump

On 2017-12-25 by (mod) -

Vince

The tank air pre-charge - with no water pressure in the system - needs to be set to 2 psi below the pressure switch CUT-in pressure.

See WATER TANK AIR PRESSURE ADJUSTMENT

On 2017-12-24 by Vince

I changed pump and tank and its only pressuring up to the cut-on pressure of 30 lbs and kicks on for about three seconds by itself no tap open??? Thanks for advice. I'm thinking pump should be returned?

On 2017-06-04 by (mod) - pressure switch doesn't trigger pump

Rob,

A reasonable guess for the problem you are describing is a debris clogged or sticking pressure control switch.

If there is sediment or rust in the water supply, those can plug the opening into the bottom diaphragm on the pressure control switch which causes it to fail to respond as it should to a drop in water pressure.

I would replace the pressure control switch and I would be sure that there is no debris clogging the tube or a small diameter pipe that conducts water pressure to the switch.

see PRESSURE SENSOR CLOG / FAILED DIAPHRAGM

On 2017-06-03 by Rob

As water is running, pressure lowers at a slow steady rate from 50 to the lower 30's then all of the sudden drops to 0.

The pressure switch won't trigger until a minute or so later. And then fills again. Pressure doesn't change unless we're using water so I know there aren't any leaks or backflow problems. I can't explain that sudden drop in pressure. Any ideas?

On 2017-05-25 by (mod) - pump can't reach shutoff pressure

If the pump cannot reach shutoff pressure there are several causes such as a damaged impeller or pump motor or low voltage to the pump. A more complete list of causes and cures can be found in an article you'll see if you would please use the search box just above to find the InspectApedia article

on WATER PUMP WONT STOP RUNNING

On 2017-05-25 01:14:25.759471 by Lucy

I have new Check valve pressure switch and gauge and new water tank.
Pressure will only go to 22 and shuts off,

It is set to 32/50.
Replaced all this cause old one was doing the same .
Why won't it reach shut off pressure

On 2017-01-04 by Anonymous

The water pressure on all of the faucets in the house is really low

Just replaced the pump, the control box, the wiring and the pipe in a 400 got deep well. it worked great for about a week but now I am only getting about 26psi of pressure. I replaced the circuit breaker and the pressure switch and check valve too please help I have run out of ideas.

On 2016-09-15 by (mod) - hard time getting it up to pressure.

Crystal Please search InspectApedia for WATER PUMP WONT STOP RUNNING to see the best diagnostic suggestions for a pump that can't reach cut-off pressure.

I can't say if the issue here is a piping leak, low voltage, or a control issue.

On 2016-09-15 by Crystal

We have a deep well, just replaced the pump, had a hard time getting it up to pressure. Got it to 50, checked for water, ran for a few seconds then no pressure at all, just a light stream of water from the faucet. Any ideas?

On 2016-09-06 1 y (mod) - If the pump is having trouble reaching the cut-off pressure I suspec

If the pump is having trouble reaching the cut-off pressure I suspect

- low voltage

- piping leaks

- damaged pump

- low well water flow rate

Search InspectApedia.com

for WATER PUMP WONT STOP RUNNING to read diagnostic and repair suggestions.

On 2016-09-04 by joe2100.jh

I am having to prime my well pump manually. It's not that big of an issue, I know how to do it but its annoying.

The real issue is that once primed and pressure raised to 60psi(it struggles to do so), water will come out of my garden hose once turned on, but not getting any water to the house. I am needing to know if it's an issue with the pump or the well itself.

On 2016-07-28 by Nanette

I have a private well and little water in house pressure is under 20
What's happening

On 2016-06-12 by (mod) - signs of a water logged pressure tank

Sounds like a water-logged or non-functioning pressure tank

See WATER PUMP SHORT CYCLING - home

On 2016-06-12 by Well water pump

Pressure comes on normal pressure but with in five seconds cuts pressure by half the amount

On 2016-05-30 by (mod) - jet pump runs but no water

Lalit the motor may be running but the pump impeller could be shot, or you need to search InspectApedia for HOW TO PRIME THE PUMP to get it going. Don't let a well pump run dry or it may be damaged.

On 2016-05-28 by lalit

Jet pump running fine but not succing water from 85 feet well


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Continue reading at TABLE 2: PUMP RUNS, WEAK or NO WATER PRESSURE or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

Or see WATER PRESSURE LOSS DIAGNOSIS & REPAIR - home

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Suggested citation for this web page

TABLE 2: PUMP RUNS, WEAK or NO WATER PRESSURE FAQs at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

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

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