Jfharper
Member
Thanks...so I've read one can set the sub a few inches to several feet above the bottom of the well if using a shroud. Being my situation where I measured water level at 50', sub at 60', and well bottom at 75'...possibly deeper if there is sediment...if I go with the no sand method you described above and longer shroud, lets say 2' sub length + 2' shroud past motor length + 5' extra = 9'...right now I have 15' from measured sub top to measured well bottom which gives me 6' remaining to lower sub.Reach is right that a longer shroud will not help deepen your pump. As soon as the water level drops below the intake of the pump you will loose prime. But I do use longer shrouds to keep from pumping a lot of sand. If you leave the shroud sticking out past the motor 2 or 3 feet, the water velocity coming up the 4” pipe is so slow that sand won’t come with it. This helps keep sand out of the pump and system. However, the sand will fall back to the bottom of the well and will eventually fill up to the pump. This only works when you have the shroud and motor several feet above the bottom of the well.
If I don't go the no sand method, shroud is at motor bottom or a couple inches past I gain 2' there as well can lower sub a few inches above well bottom and gain 5' more...lets minus 1' for sub set above well bottom, I now have 12' to lower sub if shroud is motor length and sub set 1' above well bottom.
This assumes I cannot clean any sediment out with jetting. I am at a level with a dry seasonal river bed, course sandy condition...well casing is 6" pvc...would you consider this to be a situation where I should use your no sand method (6' sub drop) or should I go the 12' sub drop?
When I do the jetting, I could see if I suck sand up...if so would that tell me which way to go? Thanks again for all your help.