Fernco 4"x4" Clay Pipe Flexible Coupling with 2 Stainless Steel Clamps, specially designed for clay to clay connections. Its unique PVC compound ensures a positive seal for any sewer and drain connection, meeting ASTM C1173, CSA B602, and D5926 specifications. Suitable for drain, sewer, vent, and waste applications, this coupling can withstand a pressure rating of 4.3 psi and operates within a temperature range of -30 to 140 degrees Fahrenheit.