It will only work properly if you put it very close to the foot valve. In which case you may as well replace the foot valve - it's not difficult to do. If you put it at or near the pump, the pump will just suck air.
foot valve leaking,
A foot valve, in relation to a water well, is a check valve at he bottom of a well to keep the water from running back into the well from the pump when the pump is not running. If the check valve does not hold the water the pump will lose it's prime and will not pump water.
PCV valve may need replaced or the air intake may be leaking. Check for holes in the intake system or vacuum leaks.
You pop the seal and see if it closes properly. If there is any doubt at all, it's easy to change. - If you are operating a jet pump and it won't prime, the foot valve ( just a different check valve ) is always suspect.
faulty foot valve will lead to absence of water column in a line. this gives rise to cavitation in pumps. As a result, suction of pumps is affected.
A foot valve is something that you eat with your foot
When the check valve failed to seat properly at the lower unit in our well, the reserve tank would drain down quickly and then the pump would run again and again and again, . . . If you have a valve between the pump outlet and the tank you can turn it off to check operation of the tank. Most likely your valve has failed. It did this very often until we had the entire mechanism in the well replaced and installed a submersible pump. No problems since and the submersible pump is hardly audible compared to the old pump motor which was mouted near the well head in the basement. Good luck. Bob Jarnutowski bobjarn (at) hotmail.com Ans 2 - A deep well pump does not have a'foot valve' -they are only on a jet pump. You have NOT told us the exact problem. If the bladder tank is not holding water then you may have a faulty check valve on top of your deep pump. Splits in the pumpdrop line down the well are also common. -The bladder in the tank can also be faulty. -You must tell us ALL symptoms , not just ask about two things you've heard names of. Best solution - call a well tech , NOT a plumber !
You disconnect the horizontal pipe from the vertical well pipe at the wellhead, and pull up the vertical pipe.
Are you sure you don't mean 'foot valve' - this is the valve at the bottom of a well suction pipe when you use a jetpump. I've never heard of 'foot trap'.
You will have to dig the well deeper and adjust the length of the pipes to reach the water where the foot valve or pump is.
Possible vacuum leak either under hood or under dash Check valve on brake booster?
If the valve stem seals are bad the intake valves will "suck" oil into the cylinders. One common indicator of worn valve stem seals is to take your foot off the accelerator for several seconds when going downhill, then watch for smoke when you step on the accelerator again. If you see a puff of BLUISH smoke, you probably have bad valve stem seals. The catalytic converter can become oil fouled so that would be another indicator that you might have valve stem seal problems.