Hot Tub Compatible With Watkins Spas Insulation For Heaterbody 70868-BYPThis insulation minimizes the heat loss through the heater housing. The insulation is wrapped around the stainless steel heater body used in 115 volt spas made from 1980 to 1994. Was 70868 Now 70868 BYP You Will Receive One Item 70868 BYP This part can be found on Hot Spring F, H, J, JA from 1989 to 1989 F, H, J from 1990 to 1994 H, J from 1994 to 1994. Hot Spring pre 89 HP, I, IA from 1989 to 1989 I from 1990 to 1994 I from 1994 to 1994 IA from 1990