The waterway hot tub pump union 400-4240 has threads referenced as 1-1/2-inch with an actual inside diameter of 2-7/16-inch. The plumbing connection features a 1-1/2-inch spigot end. The spigot end of this union is designed to fit inside a fitting referenced as a 1-1/2-inch slip with an actual inside diameter of 1-7/8-inch. It's important to note that in the pool and hot tub industry, plumbing dimensions are referred to as nominal sizes rather than actual sizes.
Details:
- Waterway P/N: 400-4240
- Brand: Waterway Plastics
- Threads: 1-1/2-inch, (Actual ID 2-7/16-inch)
- Connection: 1-1/2-inch Spigot
- Colour: White
- Material: PVC
- Includes O-ring
If it measures:
- 2-7/16-inch, then you need a 1-1/2-inch
- 3-1/16-inch, then you need a 2-inch
- 3-11/16-inch, then you need a 2-1/2-inch
