Thompson Pipe Group (TPG) is a privately held family business of engineers, contractors and manufacturers based in Rialto, California. TPG is now the largest and most diverse drainage, sanitary, pressure and trenchless pipe provider, with manufacturing locations across the country and serving not just the US but all of North America. Products manufactured by TPG are precast; concrete, steel and fiberglass reinforced polymer pressure pipe; Polycrete polymer concrete pipe; Flowtite® FRP; Flow-Crete™, Trenchless and more! TPG's main... read full review »