Waterway Plastics 400-5570 Pump Union

Nut side is 2″ FBT and measures approximately 3″ in diameter. Tailpiece side is for 2″ PVC piping. Fits select Waterway Filter and Pumps, check your manual to ensure proper fit. Measure the outside diameter of your existing pump union. On this part, 2” Buttress thread measures approximately 3” diameter.