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The air gap should be a minimum of 8 inches above the ground, with a minimum of 2 inches of air space, or a minimum of 2 pipe diameters. Overflows discharging into a drainage channel or catch basin should have a minimum air gap of 2 overflow pipe diameters above the flood rim of the receiving basing.
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PVC Pre-Pak Well Screen. Well Gravel - 20 x 30 silica sand Well Screen - .010 slot Sch. 40 PVC well screen Outer Layer - 65 mesh stainless steel screen Smallest Filtration Capacity - Fine Sand.
Slotted PVC Water Flow CalculationTechnical Bulletin
DESIGN AND INSTALLATION OF MONITORING WELLS - US EPA
that rival those of other screens, often at a fraction of the cost. Combine PVC screens with PVC well casing for the ultimate corrosion-resistant, low-maintenance water well! A Size and Joining System for Every Application Slotted casing can be produced in sizes from 2" all the way up to the largest commercially available PVC well casing
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