6" x 4" PVC bushing is ideal for radon mitigation for sub-slab suction points. This bushing is ideal when using a drill and chisel to make your suction point. The extra large opening makes you radon mitigation much easier work when digging out the suction pit. Bushing fits 4" schedule 20 PVC or can be used with 4 X 4 or 4 X 3 rubber coupling or 4X3 PVC reducer bushing. Required hole size in slab is 6.25" or 16 cm.
Radon Professionals
