DISCOVER THE PRO-PLUS® DIFFERENCE.   The PRO-PLUS® Trench Drain System is lighter, stronger and expands and contracts in extreme temperature ranges less than polymer concrete, polypropylene, and HDPE. In addition, SMC/GRP has greater compressive, flexural, and tensile strength and less thermal expansion properties than polymer concrete, polypropylene, and HDPE. SMC/GRP is an innovative material and … Continue reading Trench Drain System – PRO-PLUS®