Polypropylene insert couplings are used to join two pieces of polyethylene pipe in a straight line in cold water applications only. Can be used underground or above ground for pool and spa applications water service and agriculture uses. Brand Name: Boshart Industries End 1 Diameter: 1-1/2 in. End 1 Type: Insert End 2 Diameter: 1-1/2 in. End 2 Type: Insert Material: Polypropylene Product Type: Coupling Number in Package: 1 pk Application: Cold Water Maximum Pressure: 160 PSI Average Lead Content: Lead-Free ANSI Certified: Yes Packaging Type: Bagged Underground Rated: No NSF Listed: Yes IAPMO Certified: No Maximum Temperature: 73.4 °F.