Gritres
New Member
I've got a newly installed 2" shallow well with a johnson 10 foot 0.012 screen. I'm getting 15-20 GPM. Is this enough water velocity through that big 2 inch pipe to ensure that sand that is able to get through the screen comes up with the water or am I running the risk of building up a lot of sand in the screen over time? Valveman I saw in another thread where you had mentioned 3 feet per second to bring up pebbles, I can do the math to figure out the right GPM for my pipe but I'm wondering where you're getting that value from and if you have a link to a chart or if it's just a well known approximation.