Description
The 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 reliable flow from the container and protects the integrity of your pH dosing system. Match the grey color and part number to your existing fitting before ordering.
Specifications
| Pentair Part Number | 521509 |
| Part Name | Vent Fitting, Grey |
| Color | Grey |
| Quantity Included | 1 (Each) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | Commercial IntelliChem Chemical Controller IntelliChem Series | INTELLICHEM | |
| Pentair | IntellipH Container IntellipH Series | 522712 | Vent Fitting Chemical Container replacement part. Verify fitment before ordering. |
Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment’s manual or on the original part itself before ordering.
Pro Tip
Inspect the vent fitting any time you replace or refill the chemical container. A fitting that is visibly cracked, deformed, or blocked with chemical residue should be replaced at the same time it is a low-cost item that is easy to overlook until it causes an interruption in chemical dosing. Confirm the grey color matches your existing fitting; verify part number 521509 against the number on the original before ordering.
