The 3/4 and 1/4 inch port are used on this stainless steel heater housing. Providing you with what you need for your 115v hot tub heater. The pipe-like heater housing has three total ports.
Easy to install to meet your needs using vinyl tubing 70315. Compatible with the 1990 to 1994 Hot Spring Highlife spa models.
*Check specs section for full list of compatible models and years.