Hot Tub Replacement Part Compatible with Watkins Tubing & Hoses Vinyl Tubing, Thick Walled, 3/4" Dia. (ID) x 36" HTCP70315 . 3/4" inside diameter (ID) by 36" long section of specially made thick walled, clear vinyl tubing. This thick walled tubing will stand up to the harsh chlorinated spa environment for years to come. This is the size of tubing that connects the circulation pump to the heater in all Hot Spring and Tiger River spas from 1990-2008. Use the 1/2" tubing for 1982-1989 Hot Spring spa models.
- This is for a Single Vinyl Tubing, Thick Walled, 3/4" Dia. (ID) x 36"
- The diameter is measure from the inside of the tubing