This is a union adapter designed to install into a pump volute and suction connection in order to prevent the failure of high temperature build up in pump volutes when dry running pumps build up severe heat. Maximum Service Specifications: 80?C/176?F at 3.5 BAR/50 PSI Plumbing Connection: 1.5" Male Pipe Thread x 2" Slip - Eliminates stressing on outer thread of mating parts due to over tightening - Eliminates the requirement of thread sealants, while proving a reliable seal on the O-Ring surface - Provides easy installation while supplyniog a union connection for future serving needs