The waterway hot tub pump union 400-4240 has threads referenced as 1.5" with an actual inside diameter is 2-7/16”. The plumbing connection features a 1.5” spigot end. The spigot end of this union is designed to fit inside a fitting referenced as a 1.5-inch slip with an actual inside diameter of 1-7/8”. 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: 1.5", (Actual ID 2-7/16")
- Connection: 1.5" Spigot
- Colour: White
- Material: PVC
- Includes O-ring
Pump Union Sizes.
Measure the Inside Diameter "ID" of your current "CLOSED" split nut or regular nut.
If it measures:
- 2-7/16" then you need a 1-1/2"
- 3-1/16" then you need a 2"
- 3-11/16" then you need a 2-1/2"
