Question about Flotec Corrosion Resistant Shallow Well Jet Pump 1/2HP, 8GPM

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Cabin pump, primed fine only goes to28psi and keeps running

I have a 40 gal bladder tank. I shut pump off to check relieved water pressure and checked pressure through scrader valve it was 29 psi right at recommended psi. There was some sand debris in the beginning but cleared up. There is no flow interruption when hooked directly to the discharge on the tank,any ideas. Tank pressure is set for 30/50 psi.

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  • JODY BRIDGERS May 11, 2010

    ARE YOU CHECKING THE PRESSURE ON THE PRESSURE SWITCH AND GAUGE MANIFOLD OR THE VALVE ON THE TOP OF THE BLADDER TANK? ABOVEGROUND PUMP OR INGROUND SUBMERSIBLE? WHAT PRESSURE IS YOUR SWITCH SET TO COME ON AND CUT OFF AT?

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Sounds like the injector nozzle is plugged. This nozzle is directly inside the influent line on single line jets and down in the well on two-line jets. I'm assuming you have it primed correctly. If this happened suddenly the it'd definitely the injector nozzle. It it was a gradual process over time then I would say it's either a badly worn nozzle or worn impeller.

Posted on Sep 08, 2009

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Pump will not build enough pressure to shut off. New Bladder Tank set at 38 PSI. New switch set to cut on at 40-42 Psi. New Foot Valve, New Tank, New Pump. Blew line to well water a few days ago. Pump


check the water level in the well as it may be too deep for the pump to lift the water and maintain the pressure. Are you using a straight pump or an injection pump that helps lift the water to the pump. remember that centrifugal pumps only supply a vacuum in the suction line and atmospheric pressure on the water does the rest. when the weight of the water is equal to the pressure of the air the pump will not lift any more

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I have a new 1 hp utiltech pump and a new. Precharged tank with 34 psi in it now. When i prime the pump the pressure goes right to 25 psi and i can hear some water moving . When i open the shut off valve...


The 34 psi of the pressure tank sounds high, but it depends on what the cut-in pressure is set at in the pump pressure switch. Typically the pressure switch is for 20-40 psi or 30-50 psi. To establish what the pre-charge of tank should be , you need to establish what the pressure switch setting are (i.e 20 - 40 psi , etc.) Run the water and watch the pressure gauge and note at what pressure the pump comes on. The pressure tank needs to be pre charged 2 -4 psi below that cut-in pressure. So if the cut-in pressure is say 30 psi, then the tank needs to be pre charged to 28 psi.
To pre charge the pressure tank, turn the pump off. Drain the pressure tank of water to relieve all pressure in the tank. Then check the pressure of the tank at the air valve. Set the pressure to 2 psi below what the cut-in pressure is.
If you adjust the pressure switch, say from 20-40 to 30-50, you will need to go through the procedure of re adjusting the pressure in the tank. I hope this helps....

May 21, 2014 | Plumbing

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Problem with pump?


The pump pressure switch should be checked to see what the ON-OFF pressure is set at. Typically the pressure switch is set for 20-40 psi, or 30-50 psi. The pressure tank should be purged as well. With the pump OFF, and the tank drained of water, the air valve on the tank should read approximately 2 psi below the "on pressure". So if the system operates at 20-40, the tank should be pre-charged to 18 psi. If water escapes from the air valve, the internal bladder in the tank is ruptured, and the tank needs to be replaced. A tire air gauge is used to measure the pressure in the tank after the water is emptied from the tank.. A tire air pump or a compressor is used to charge the tank. if a compressor is used, be careful not to over-inflate the tank, as this may cuase the bladder to rupture.

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I have a flotec 1 hp pump. Wife washed 3 loads of clothes in a row and noticed we run out of water a while later. I shut pump off and noticed pressure tank low on air. I put 18 lb. air in tank and...


If in the past your system can build-up pressure up to 40 psi even if the supply valve is open and water is being used in your house, then your pump impeller maybe already worn out that's why its pumping capacity was reduced.

Nov 12, 2012 | Flotec Corrosion Resistant Shallow Well...

1 Answer

I have a 1/2 hp sta-rite well pump that only produces about 40 psi through my pipes. The problem is that there is a 40/60 switch on it so it constantly runs because it doesn't build enough pressure to...


You probably have a bad pressure tank. The pressure tank bladder can develope a leak internally nad become saturated with water which won't allow it to provide cushion for the pump to gain and maintain pressure. It could also be that there is little or no pressure in the tank. Check your pressure and add to at least 40 psi. If this helps , but doesn't totally cure your problem, you have a bad tank.It could also possibly be a bad check valve but, you would probably lose all of your prime.

May 30, 2011 | Home

1 Answer

Grundfos JPF4A pump. takes a long time to get up to prime then once it kicks in after running water it gets to 50 shuts of but drop pressure instantaneously and kicks back in again. The constant on off...


The check valve is bad. When the system builds up pressure and shuts off the check valve prevents water from dropping back down the well line. When the check valve goes bad water drops back down the well line and siphons water back out of the well tank causing the switch to kick on and off constantly. The check valve will between on the well line coming from the drop pipe. It may be making a constant rattling noise as pump is running. Replace the check valve and you should be fine. Also check the pressure in bladder tank it should be 2psi below the "cut-in" pressure for the switch.
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1 Answer

My current water tank was installed 12 years ago With Bladder. 1 hp motor. 80 gals. Water Pressure is consistantly low. When reset to 40-50 lbs, it drops shortly after back to thirty lbs in the house....


If I understand you, this is a water well. For pressure to drop, water must be going somewhere. If you see no leak in the tank, that is not the problem.
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Jan 25, 2011 | Wel - Bilt Electric Portable Air...

1 Answer

We have a Gould's domestic water pump and the limit switch was replaced and it still runs constantly and won't shut off. Any ideas??????


Yeah, if it won't shut off the pressure tank is not getting pressure to it or leaking out, first the cheapest ideas to try would be have someone turn water on when you are looking at the pressure gage, what psi is it, you want atleast 60, then, havet them turn off water, keep watching the gage for a minute see what it does if pump still runs its not building pressure so, is this a new install, or has it just started happening, if its new did you prime the pump? if you did the pressure gage may need replacing this is cheap, if that doesn't fix the problem, then you need to check your pressure tank the bladder may be worn out, so if I was you, I would also check for air leaks make sure all fittings are tight, you can take your hand and place on pump when running, turn water on to do this, or you may be able to hear air leaking, definate sign that your not building pressure so pump cant work with pressure tank, now if your bladder is still good once airleaks are fixed the bladder will build the pressure it needs then your done.

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2 Answers

The pump goes on and off repeatedly


The pump should only run if you are using water. If you have a leak it will cycle on and off. If it only cycling fast when you're using water, you may need an expansion tank, sometimes referred to as a bladder tank for newer style. If you have a "bladder" tank , the bladder may be leaking and lost it's air charge. This bladder will have an initial air charge, and when the pump runs it will compress the bladder even further. When the pump shuts off the bladder is compressed. When you begin to use water, mainly low flow like one faucet, the bladder will begin to expand expelling the water from the tank until the pressure drops below that of the pump pressure switch. This makes the pump start and stop fewer times.

Jul 05, 2010 | Flotec Corrosion Resistant Shallow Well...

1 Answer

When adding air to a pressure water pump ,i


Sounds like the bladder is gone or inproper air pressure in water storage tank.

Bladder goes bad check it out with step 1
1-
One way to check for sure with everything hooked up. The air valve on top of the tank if pressed you will get water out of the valve which should be only air. This will let you know it should replaced.

If Tank bladder is low in air and not water coming out.

2-If it checks ok put an air gauge to tank to check the air pressure, with a standard 40 gal tank you will have 28 psi of air in tank for it to function properly.

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