Union Assembly 1.5" Thread x 2" Slip. This is perfect for plumbing 1.5" pumps or filters to 2" PVC. No need for Teflon tape, reduce the risk of over tightening and cracking pump/filter housing. CPVC/ PVC. These will make plumbing your pool pump or filter easy and convenient. Unions are detachable which makes removing your equipment convenient. No cutting out existing plumbing. These unions are made of heat tolerant CPVC, seal together with a "T" ring and have an "O" ring on the threaded sideconnection. CMP 1.5 in. MIP x 2 in. PVC Hi-Temp Union 21063-160-00