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PUMP LOSES PRIME OVERNIGHT. ALL CONNECTIONS, ADAPTORS, AND CHECK VALVES HAVE BEEN REPLACED TO ELIMINATE ANY AIR LEAKS. SEEMS LIKE THERE IS EITHER A LEAK UNDERGROUND IN THE SUPPLY LINE OR A PROBLEM WITH THE PUMP GASKET. WHAT ARE THE CHANCES THAT THE GASKET ON THIS 2 YEAR OLD MEYERS PUMP IS LEAKING AND WOULD THIS CAUSE THE LOSS OF PRIME?

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Yes, any air leak could allow the pumps system to draw air in to it. This could happen through a gasket or the mechanical seal although if the foot valve is in good shape and there are no leaks within the piping system the pump should hold prime. My guess is there is some type of leak within the suction piping that is creating a slight vacuum. A vacuum leak, even a small amount, is very powerful at drawing air in to it. My first thoughts are to insure the suction piping and its components are all proper.
I hope this may have helped,
Tom

Posted on Oct 10, 2009

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My prime bulb looses pressure and first start is hard. I have to remove fuel line from filter and cover with thumb prime re install then first start takes time.


Does the engine run fine after it starts? Most common problem with primer bulb losing prime is an air leak in the fuel line or primer bulb. Air leaks don't always leak fuel. If there is an air leak between the primer bulb and gas tank there is no pressure, only vacuum. If it is not a major leak it might not leak without pressure but it will allow air to enter the fuel line. If it is a very minor air leak it could allow air to replace the liquid in the fuel line over time, but so little air once it is primer again that the fuel pump can over come it with volume of fuel.

Primer bulbs do not stay firm, as they are when initially pumped up, after the engine is running. There are check valves in the primer bulb that hold pressure in the primer bulb and throughout the fuel line to the engine. Once the engine starts the fuel pump creates vacuum drawing fuel into the engine diminishing this pressure and releasing the check valves. At this point the primer bulb is just another segment of fuel hose allowing fuel to pass through it as the fuel pump demands. The primer bulb functions much better when the outlet side is higher than the inlet side. This position makes it easier for the check valves in the primer bulb to seat and release as needed. If the primer bulb is functioning properly and is positioned with the outlet side higher than the inlet it should not be necessary to cover the end of the fuel hose with your thumb to get it to prime.

If the engine is hard to start after being fully primed there could be a problem with the fuel system on the engine. Some engines are hard to prime once air has entered the system, especially fuel injected models.

Dec 19, 2014 | Boating

1 Answer

Well pump losing prime


you might have a leak in the foot valve, you can try installing a check valve several inches before the intake to maintain a prime, or check and clean/replace the foot valve.


If the pump ran dry, check the inlet fitting. the pump can get hot and melt pvc piping connected to it, causing air to leak in the inlet side.,

Feb 14, 2014 | PENTAIR WATER Pentair Sta-Rite DynaPro 1HP

1 Answer

Been having a problem with well losing prime overnight. Is a deep well with pump above ground. During the day with periodic water usage the well pumps good with good pressure and sits on 50 lb pressure. ...


Hi Bert Man...

You problem is the "foot valve" at the bottom of the well is worn or has some dirt/debris in the sealing face and allowing the water to flow back into the well overnight when the pump is not keeping the pump and well pipe full of water. They are non replaceable being they are at the bottom of the well, hence the name "foot valve".
You can correct that problem by the addition of a check valve above ground installed in the suction pipe of the pump, be sure it is a spring loaded device so that you can install it in any position..
Another way to keep the pump primed is to feed a small amount of pressurized water into the pump all night, you can do this by the addition of a connection to where the pressure gauge connects to the pump.
Please take time to rate me

Aug 31, 2011 | Plumbing

1 Answer

Our sewer pump loses prime, when we manually re-prime it will pump but constantly loses prime.


pumps that continually loose prime 4 sure have an air leakage problem two places that most pumps can leak air into them are (1) input shaft seal
(2) check valve

the check valve is by far the easier of the two to replace id start with that one first some waste water pumps have two check valves on them one on suction line and one on discharge line (if over 10 feet high)

Jul 31, 2011 | Monarch Pumps BE-S75 Wastewater Pump...

1 Answer

Had to replace shallow well pump. Bought jet pump (used to have centrifugal pump), and installed it. Had to replace inline check valve, losing well prime. Priming pump does not accomplish the job. ...


Hi,
Aj, do you have a foot valve on the bottom of the pipe in the well?? The jet pump needs to have a foot valve to hold the water in while priming it... you also have to carefully design the system and prime it in such a way as to eliminate all of the air in the piping. A jet pump will not pull the water and expel the air like a centrifugal pump will...

I think the part you are missing is the foot valve...

heatman101

Jun 09, 2011 | Garden

1 Answer

I replaced old pump w/ Flotec 1/2HP FP4012 and replaced old pressure tank w new 35gal tank. Pump primed but cycles on-off every minute constantly even w/ no water turned on. Goes to 50PSI, loses pressure...


The water and therefore the pressure has to be going somewhere. If you are sure that there are no leaks in the house or outside, then the water is going back into the well. There is a check valve either in the suction line of the pump between the top of the well and the pump or down in the well.
If this check valve fails, it allows water to go the wrong way and back to the well. The result is that you lose pressure.
Secondly, you have to be sure that there are no air leaks between the top of the well and the inlet to the check valve. Leaks in that piping will make repriming difficult.
Write back with more and I'll try to help more.
Gary

Jan 22, 2011 | Flotec Corrosion Resistant Shallow Well...

1 Answer

My Kreepy Krauly doesnt want to ****


With these pool cleaners, your problem if going to be an air leak. You need to find and correct the air leak that is causing the pump to lose its prime. Check the hose to ensure that there are no leaks. Check your vacuum connection. It should be submerged so no air enters the system. Check your pump basket lid for looseness, cracks, and worn or missing o-rings.

Aug 01, 2010 | Universal Kreepy Krauly In-Ground Pool...

1 Answer

When my pump turn on it does not want to work you hear it running but that is it, it sound like it needs to be primed or something to kick in gear


you will need to fill the pump hair/lint pot full with water before you try to start it up. If it keeps losing prime, you'll need to investigate why it's happening. A possible air leak on the suction line, a cracked lid o-ring, an extremely dirty filter, or an air leak in the multiport valve on the filter. When the pump picks up prime, check for air bubbles in the pump pot, excessive air getting into the pump indicates a suction side leak. Any other leaks on the pressure side will lead you to where it may be letting air into the system and causing the pump to lose prime while the system is off.

Nov 09, 2009 | Hayward SAND FILTER, PRO SERIES

1 Answer

My well pump keeps losing its prime. The pump


There may be a slight leak within the suction piping, just enough to allow air to enter as its sits for an extended time. I'd be ceratin the foot valve is good and check over all of my suction pipe connections.
I hope this may have helped,
Tom

Oct 29, 2009 | Plumbing

1 Answer

Silverado not starting unless prime


There is a check valve in the fuel pump that sounds like it may have gone bad. Check the fuel pressure at the shredder valve, there should be 60 to 65psi during the prime and will drop 5 psi when the engine is running. Once the fuel line is primed, check to see how fast you lose your prime. Since you replaced your injection system, we can eliminate the fuel pressure regulator leaking which was common on the injection system your truck run's on. If the fuel pressure drops fast then it's going to be a bad check valve at the fuel pump and it may be time to replace the fuel pump it self. Good luck and hope this helps. Note: do not try to start the engine with putting gas through the throttle body, it's been know for small fires to start and burn the spider injectors. 

Sep 04, 2009 | 1999 Chevrolet Silverado 1500

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