Hayward S311SX Top Elbow Assy w/Diffuser (SX311CD1FWS) airbuttons This type of part is

This type of part is especially useful when multiple bottom-lid related pieces are worn

Including the tube

and this Jacuzzi Whirlpool Bath version is a 2-position panel with one knob in almond using the 8267914 reference

A union like this is useful because it allows the connection to be disconnected for service later while still supporting a clean

Reference part number K11 when matching to your existing component

Hayward S311SX Top Elbow Assy w/Diffuser (SX311CD1FWS) airbuttons This type of part isThe top elbow and diffuser assembly helps guide incoming water into the sand filter tank so it can spread across the media bed instead of channeling in one concentrated area. This Hayward replacement assembly is designed for compatible S311SX sand filters. A cracked elbow, missing diffuser, or worn internal connection can reduce filtration quality and put stress on other components. Replacing the assembly helps preserve proper flow distribution and