F-S2 Retrofit sump seal, brass valve. Whenever the sump is being sealed due to concerns about radon gas or odors we recomend installing model F-S2 right in the cover.
The sump model F-S2 Drajer is designed to be used as a part of the cover for a basement sump. Dranjer seals permit unrestricted flow of water into floor drains or sump pits while sealing out the entry of mold spores, insects and radon gas from the sub-slabe floor area.
Radon Testing (1)
