The Form-A-Drain system provides forming, drainage, and radon reduction all in one product. Made of PVC, the footing system forms a complete loop around a building, and is left in place after concrete foundations are poured. Groundwater is collected through side vents and transported to a sump pit or drainage pipe, while radon gas is collected and safely removed through a separate pipe. The system is available in 4-, 6-, 8-, and 10-in. widths. CertainTeed. 800-233-8990.