This newly designed standpipe (redesigned in Feb. 2012) is used to make a 1990-current Hot Spring spa "EverFresh®" ready. Also fits some Caldera models This gray colored standpipe is modified to enable it to accommodate the FreshWater Siver Ioniser. The AG+ Silver Ioniser cartridge is inserted into the top of the standpipe and is suspended within.
Replacement filter standpipe for Hot Spring Classic & Sovereign models from 1984-1990, and Tiger River models 1991-current. Also fits some Caldera models Uses cap with code 31389
Hot Spring Replacement Check Valve 3/4'' Official Hot Spring Part 35233 This valve is used on Endless Pools, HotSpot Spas, Hot Spring Spas, Limelight Spas and Tiger River Spas.