Originally designed with one 6″ CPVC water main, Uponor Design Services proposed a PEX homerun plumbing system with 2″ dedicated PEX lines running from the water entry to riser locations throughout the buildings. All the buildings were …. Approved for drinking water (NSF/ANSI 61, NSF/ANSI 372), the commercial grade compact booster and its highly efficient integrated ECM motor maintain constant pressure regardless of changes in demand. The all-in-one …