bcd11
New Member
I am driving wells in VERY FINE sand for a lawn watering system. I jetted/drove a 4' x 1 1/4" #10 slot PVC sand point to a depth of 24', my water level is 15'. After 4-5 hours of operation my sand point has filled with
2' of sand. I am using a centrifugal pump and getting 27 gpm at 40 psi from two 1 1/4" wells.
I would appreciate opinions on using a #7 Slot sand point instead of #10, not using points and driving casings to a depth of 25'-30' into which I would lower suction pipes w/strainer and foot valve, or using wound wire points.
I'm leaning toward the casings which would be flushed out and the suction pipes then lowered into. I think this is what Bob NH meant, but I'm not sure, when he suggested 4" or 6" casings in an earlier post. It seems to me if I keep the end of the suction pipe far enough above the bottom of the casing I should avoid filling the system with sand.
Any thoughts from someone that has tangled with VERY FINE sand would be most appreciated or if Bob NH reads this post maybe he could confirm my slant on his earlier reply.
Also, can someone tell me how a #7 slot compares with 60 mesh gauze from a size of opening standpoint? I have a metal point with 60 mesh gauze that doesn't seem to be filling with sand. Even though it seems to be working I am hesitant to drive another metal point w/drive pipe as I had to pull one earlier and lost the point.
Thanks in advance for any thoughts and suggestions.
Bart
2' of sand. I am using a centrifugal pump and getting 27 gpm at 40 psi from two 1 1/4" wells.
I would appreciate opinions on using a #7 Slot sand point instead of #10, not using points and driving casings to a depth of 25'-30' into which I would lower suction pipes w/strainer and foot valve, or using wound wire points.
I'm leaning toward the casings which would be flushed out and the suction pipes then lowered into. I think this is what Bob NH meant, but I'm not sure, when he suggested 4" or 6" casings in an earlier post. It seems to me if I keep the end of the suction pipe far enough above the bottom of the casing I should avoid filling the system with sand.
Any thoughts from someone that has tangled with VERY FINE sand would be most appreciated or if Bob NH reads this post maybe he could confirm my slant on his earlier reply.
Also, can someone tell me how a #7 slot compares with 60 mesh gauze from a size of opening standpoint? I have a metal point with 60 mesh gauze that doesn't seem to be filling with sand. Even though it seems to be working I am hesitant to drive another metal point w/drive pipe as I had to pull one earlier and lost the point.
Thanks in advance for any thoughts and suggestions.
Bart