78 mm pump union for 50 mm pipe

This union has a nut that fits on pumps with a 78 mm outside diameter thread (this type of thread is known as 2-inch MBT), and connects to 50 mm pipe. It is compatible with several pump brands, including Waterway, LX Whirlpool, Aqua-Flo, ITT/HydroAir, Balboa and Koller.

The o-ring is provided. If the nut breaks, you can replace it with a split nut.

This union does not fit pumps manufactured by Espa, SIREM or Davey Spa Power.

Dimensions
Inside diameter of the union thread: 75 mm or 2-inch FBT
Inside diameter smooth side: 50 mm
Outside diameter of the corresponding male thread on the pump: 78 mm

Part numbers
Tubs Parts: U78-50