1.5" MBT to 2" MBT pump union adapter

This pump union adapter is used to convert the union thread on a pump to a different size of union thread.

This adapter allows you to screw a 78 mm pump union onto a 62 mm or 1.5-inch MBT pump thread. In other words, it allows you to effectively increase the size of the male thread on your pump from 62 mm to 78 mm.

If you don't already have them, you may also need to purchase a 1.5" o-ring for the pump side, and a 2" o-ring for the union side.

Dimensions
Inside diameter of the female thread: 59 mm
Outside diameter of the pump thread: 62 mm
Outside diameter of the adapter thread: 78 mm

Part numbers
Gecko/Aqua-Flo: 50100120