Pentair Vent Fitting, Grey | IntellipH Container | 521509 CCXAG The Pentair Replacement Top-Mount Valve

The Pentair Replacement Top-Mount Valve is the perfect solution for replacing the backwash valve on your Sta-Rite Cristal-Flo Filter system

Inspect the basket for cracks or distortion when cleaning

deck flanges and hardware kit

and matching the 22-5/8 in

The legacy cross-reference S18600 may appear on older equipment labels — both numbers refer to this same kit

Pentair Vent Fitting, Grey | IntellipH Container | 521509 CCXAG The Pentair Replacement Top-Mount ValveThe Pentair Vent Fitting (521509) is the OEM replacement grey vent fitting for the Pentair IntellipH Chemical Container, designed to maintain proper pressure equalization within the chemical feed system. The vent fitting allows the IntellipH chemical container to breathe as chemical solution is dispensed, preventing vacuum lock that would otherwise interrupt consistent chemical delivery. Replacing a cracked, clogged, or missing vent fitting restores