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Second Tap Sub-Slab Radon System

Radon Mitigation System Information

Second Tap Sub-Slab Systems are installed in homes or businesses with slab flooring and are necessary in situations where a single tap or collection point is not adequate enough to bring radon levels in the establishment down to safe levels. This is either due to the amount of radon gas found in the location or due to the soil found underneath the building.

Second Tap Sub-Slab System Diagram
Diagram of a second tap sub-slab system for radon mitigation. 

The system works by creating a negative pressure under the home where the radon collection points have been established. The radon mitigation system is made up of PVC piping. A second tap involves running a second set of piping connected to the first sub-slab radon collection point to a fan that is mounted on the exterior. The fan draws the gas outside the building where it is expelled through the stack that extends past the roof line of the structure. This is a common practice for homes that need more power or collection points to help mitigate the radon from underneath the structure. The radon fan that is mounted outside of the building must run continuously in order for the system to work correctly to mitigate the radon from the home or building.