This coupler or adapter is used to connect 3/4-inch pipe to 1/2-inch pipe.
It has a 1/2-inch male end for connection to a 1/2-inch female fitting. The other end connects directly inside a 3/4-inch pipe.
It is part of Waterway's "Smart Plumb" line and is made of high quality ABS plastic.
We particularly recommend this coupler if you are using a 3/4-inch clear tubing to ensure a better fit. If you are using 3/4-inch flexible pipe, however, you will find that a smooth coupler will fit more easily than this ribbed coupler.
Outside diameter 1/2-inch male: 21 mm, fits into a 1/2-inch female fitting
Ouside diameter 3/4-inch male: 20 mm, for a 3/4-inch pipe insert