Sundance Spas Drain Valve 1.5" Threaded Plug

6540-104 Sundance Spa 1 1/2 Inch Threaded Plug With Oring.

It is used on:

- Sundance drain valve assemblies up to 2003
- 2012 880 Series Quick Drain assemblies
- Some later Jacuzzi-branded models that use the same 1½" quick drain design.