I've just driven a 1-1/4" wellpoint into sand to irrigate a
vegetable patch. Need 2-4 gpm at 40-50 psi. Water table is
at 5 feet, point is down about 14 feet.

Two questions. One, what is the best type of pump to use?
One irrigation supplier recommends a centrifugal (Grundfos
self-priming MQ 3-35, 3/4 HP). Another suggests a jet pump
(Goulds BF03S, 1/2 HP with integral tank). I'd appreciate
your advice as to which to use.

Also, should I put a filter on the intake side of the pump?
Thanks for all suggestions.