Surges and well sand

Old 08-07-01, 05:38 PM
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Getting surges and well sand. Pump & pressure tank are a little over 1 year old. Surges are frequent but the sand shows up only now and then. What could be the cause and/or solution? Thanks in advance.
Old 08-08-01, 09:32 AM
Mike Swearingen's Avatar
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Pump surges can be caused by a number of reasons.
First, check the air pressure of the pressure tank with a tire gauge. It should be two psi below the cut-on pressure, with the pump off and the water pressure drained down.
If it is too high, bleed it off to 2 psi below cut-on. If it is too low, air the pressure tank back up with a bicycle pump or portable air tank or compressor.
If the pressure tank is O.K., check the pressure switch. It will have either a single or double spring-loaded nuts.
If single, it will be factory-set 20 psi apart for cut-on and cut-off.
If there are two, the smaller will be for the cut-on and the larger will be the cut-off. Turn them down to increase pressure, and up to decrease pressure, keeping the cut-on and cut-off about 20 psi apart.
Your residential pump should be at 20-40 or 30-50 psi, depending upon the manufacturer's recommendation for your particular pump.
Hopefully re-adjusting the tank or switch pressure will solve your surge problem. If not, we can go to the next level.
As far as the sand, you can install an in-line filter in the pipe past the pressure tank. Make sure that the filter (and micron size) is specifically to deal with sand filtration or you may severely restrict the water flow.
Good Luck!

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