Description Fernco Proflex Couplings are an above ground transition coupling that create resilient pipe joints. The shielded design resists shear forces above ground. From 1-1/2 in. to 8 in. pipe diameters, Proflex connects cast iron, plastic, steel, copper and tubular drain waster and vent systems.PRODUCT DETAIL:Shielded design to resist shear forces above ground only Designed for use with cast-iron, plastic, steel and copper drain, waste and vent systems Install using a torque wrench to ensure a water tight connection Maximum operating temperature of 180ÂF Tested to 4.3 maximum test pressure Rated for above ground use only Note: product may vary by store