1.5" Foam Bridge

Compressible foam seal wrapped in a polyethylene sleeve expands instantly when exiting the bottom of the drive casing to provide positive placement of a bentonite barrier that prevents solids from entering the screened area. Expands when exiting the bottom of the Direct Push Casing Provides positive temporary barrier when used above the water table in conjunction with granular bentonite, pellets or chips Constructed on 1-1/2" S40 x 6" PVC Riser Male X Female Flush Thread 8 tpi