A magical piece of plumbing. Screws onto an 1-1/2" wet end and creates a 2" thread. Sometimes found on Aqua Flo circ pumps.
A get out of jail free card. An genius piece of plastic for every service engineer. Turns a 2" wet end into 2-1/2" .... perfect for front face Waterway pumps. Waterway 415-6010 2" FBT x 2.5" MBT Union Adapter with o ring.