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><font face=georgia color=red>A PVC drivepoint insert >is a closed system in which, given a fine mesh screen >or slot, sand can neither penetrate nor >accumulate.</font> > >><font face=georgia color=green>Low flow can also be >>>solved by putting fewer heads on each line, i.e. >>>adding more lines to the manifold. >>> >>>In general, I'm against using filters to get out sand >>>because it is <b>wrongheaded</b>. It couldn't be any >>>simpler -- if you don't let it in, you don't have to >>>get it out.</font> >> >>speedbump raises a good point, though. Let us suppose >>he uses a screen to screen out the sand. Every time he >>turns the pump off sand will fall to the bottom. >>Eventually, he will fill up the well with sand. Could >>take a year for this to happen, could take 50 years, >>who knows, but it will happen.

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