This compressible foam seal, wrapped in a polyethylene sleeve, expands instantly when it exits the bottom of the drive casing to provide positive placement of a barrier that prevents any solids from entering the screened area. It provides a positive temporary barrier when used above or below the water table in conjunction with granular Bentonite, pellets or chips.
Uses: Foam bridges may be used with ASTM F-480, 8 TPI flush threaded PVC or stainless steel well screens to perform a temporary seal above or below the water table while the well grout, granular Bentonite, pellets or chips, attain full hydration. These unique units perform their function whether the well is installed pin (male) up or pin down. Materials: Polyurethane foam with polyethylene sleeve on 9″ of ASTM F-480 flush threaded PVC casing. Configuration: Pipe Size: 1″ Sch. 40 PVC Thread: ASTM F-480 Flush Thread, 8 TPI Overall Length: 9″ Foam Diameter: 3-1/2″ Foam Length: 3″ Fits Casing O.D.: 3-1/4″ or NW Options:
- Foam Bridges
Other Sizes Available