Fernco 1006-44EB Flexible Coupling, 4" x 4", For Concrete to Cast Iron or Plastic, Sold 2/Pack

One piece Eccentric Coupling Connects 6" Clay to 4" Cast Iron or Plastic Aligns the inside wall of the two pipes Provides an obstruction free flow Meets ASTM C 1173 and D 5926 300 series stainless steel clamps . Maximum test pressure: 4.3 PSI (29.6KPA) Maximum operating temperature: 140 Deg F non-consistent .When grade is critical, it's critical to use a Fernco Eccentric Coupling.. Fernco's Eccentric Coupling aligns the inside wall of the pipes to create an obstruction free flow. Competitor Eccentric Coupling aligns the outside wall of the pipes creating an obstruction in the flow that can cause backing up. See Accessories below for Bushing to use with our Eccentric Couplings.