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Old 06-04-2012, 03:17 PM   #16
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pump looses prime, runs forever, burns out PVC pipe


Just looked at /studied my photo again, and...BOOM, it hit me- I can simply unscrew that top square "cap, and pour water down the pipe to seee if the valve retains the water , right? And who knows, maybe its the cap's threads themselves that arent sealing right- as in not enough pipe dope on threads...........
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Old 06-04-2012, 03:55 PM   #17
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pump looses prime, runs forever, burns out PVC pipe


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Dang, just when you figure you giot everything done right (pump not loosing prime anymore) problem comes back- a day later!. I posted above picture, in case it might help. Now, even if I install the flow cut off switch (and if theres an ideal place to install it, let me know0, I will be having to reprime every day.

Why is the pump switching on and running for hours until I notice it? (if pump is noticed running say, for only a few minutes up to about an hour, and I open a hose connected to the line system, it purges out some air, and reprimes itself, at least until the leak acts up)

Thanks!
The low pressure cut off is built into the pressure switch. Mine has a 30-50 lb. pressure switch with the cut off (Square D). If pressure drops below 20 lbs. it shuts off the pump. It just replaces your existing switch. A couple of things that can cause you a problem. If the footvalve is seeping, you could be losing prime because of the check valve in the suction line. It won't allow the suction line to stay filled with water. I really don't know why you'd need it anyway. The footvalve should be sufficient. If the foot valve is seeping, the pump will run to keep the pressure up, but you'll never know with a check valve in the line. If you are pumping water out of the well faster than it can recover, you will lose prime. Spin the plug out of the top of the tee on the suction line and thread in a ball valve. Makes priming much easier when you need to do it.
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Old 06-04-2012, 05:28 PM   #18
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pump looses prime, runs forever, burns out PVC pipe


OK, 6. Let me try that. I'll let you know.
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Old 06-04-2012, 07:11 PM   #19
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pump looses prime, runs forever, burns out PVC pipe


Is that steel pipe running under ground?
Any leaking fitting or old steel pipe rusted on the suction line side can cause your problum.
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Old 06-04-2012, 07:16 PM   #20
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pump looses prime, runs forever, burns out PVC pipe


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Don't use steel fittings on a well pump. Use Brass if you must use metal. The low pressure cut off switch is the answer. My pump has run for 40 years with ABS plastic pipe and never melted down. A pump that is running properly will never generate enough heat to melt plastic.
The pump is steel. The pipes are steel There is no need for brass fitting for a water system like this.
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