Pentair Clean & Clear Plus 520 / Quad Air Bleed Assembly | 178583 Complete QuikDekClor One of the two parts

One of the two parts it helps hold in place is the wheel bearings which are placed on both sides of the wheel

At ePoolSupply

replaced by G2 Adjustable heads

Confirm the part matches your Style 2/Gamma 2 system and that the riser pipe is pre‑reamed to 2″ diameter

Pentair Clean & Clear Plus 520 / Quad Air Bleed Assembly | 178583 Complete QuikDekClor One of the two partsPentair Clean & Clear Plus 520 Quad Air Bleed Assembly 178583 OEM air bleed tube for Pentair Clean & Clear Plus 520 and Quad D. E. filters. Prevents air lock and ensures proper flow. SKU 178583. Features Replaces worn or cracked air bleed tube for optimal filter performance Fits Pentair Clean & Clear Plus 520 and Quad D. E. 100 filters 35 1 4" length ensures full reach to manifold ports Chemical resistant materials maintain integrity in pool