Heavy Duty Stainless Steel Hi-Torq Couplings. For all storm and sanitary DWV piping systems above and below grade. Suitable for Cast to Cast, Cast to Plastic, Steel, or Copper. In conjunction with Snap-All bushing, quick and easy transition to different sizes and materials. Pressure rated to 15 psi, up to 125 torque, IAPMO, FM1680, SBCC, ICC ES, All ASTM standards, CSA.