What is the minimum volume for cleared void space in suction pits?

The minimum volume for cleared void space in suction pits is two gallons. This requirement is in place to ensure adequate space for the displacement of radon gas that may accumulate in the pit. Having at least two gallons of cleared void space helps to allow for efficient suction and drawing of radon from the ground beneath the home. Additionally, it contributes to effective ventilation and helps maintain a consistent flow during the radon mitigation process. This volume accommodates fluctuations in radon levels while ensuring that the mitigation system operates effectively, optimizing the overall performance and safety of the radon mitigation installation.