This pump faceplate is compatible with all Waterway Executive 56-Frame and 48-Frame pumps. However, it is not compatible with Hi-flo pumps. It has an MBT-type male suction fitting with an external diameter of either 78 or 94 mm (both with two o-rings).
The o-rings (you will need two), the drain plug and drain o-ring are sold separately.
In late 2017, Waterway made a minor design change to the Executive-series faceplates. Models manufactured after this change require two O-rings, adding additional protection against leakage. The old and new models are fully compatible with one another.
Waterway part numbers
78 mm thread (referred to as 2"): 311-1220
94 mm thread (referred to as 2.5"): 311-1210