Waterway Grid Support [CrystalWater w/ Center Rod 48 sq ft] (550-4310) bathparts O-rings are small parts

O-rings are small parts

5 inch face-diameter massage scale-style design

or no longer providing dependable pressure transfer

United Spas thermowell for 1/4 inch bulb applications

and this Maytronics Dolphin DX4 version uses the 99957019-ASSY reference

Waterway Grid Support [CrystalWater w/ Center Rod 48 sq ft] (550-4310) bathparts O-rings are small partsThe Waterway Grid Support [CrystalWater w Center Rod 48 sq ft] (550 4310) is a replacement filter component made for compatible Waterway CrystalWater and related filtration systems. This part helps support proper internal alignment, stability, and serviceability within the filter assembly, making it a useful replacement when an original component is cracked, worn, or missing. Filter parts need to fit correctly to help maintain dependable water flow