Pentair TR100C Inlet Upper Piping Assembly (156344) zurnwilkins and this Maytronics Dolphin version

and this Maytronics Dolphin version uses the 99954226-R1 reference

That visual detail matters because these barrels are not hidden parts

Designed for compatible chlorination-system applications

and this Jacuzzi 2 inch Dial Valve Spring is designed for compatible applications where the original spring has weakened

plumbing repairs

Pentair TR100C Inlet Upper Piping Assembly (156344) zurnwilkins and this Maytronics Dolphin versionThis genuine Pentair Pool Products inlet upper piping assembly, part 156344, is used inside compatible TR100C sand filter systems to route incoming water through the correct internal path. A properly fitted piping assembly is important for balanced distribution and dependable filter operation. Use this replacement when internal piping is cracked, damaged, or removed during a major filter rebuild. Match the TR100C model and connection layout before