Pentair Vent Fitting, Grey | IntellipH Container | 521509
Pentair Pool Products and Parts

Pentair Vent Fitting, Grey | IntellipH Container | 521509

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SKU:
521509

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About This Item

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.

CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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Pentair Pool Products and Parts

About Pentair Pool Products and Parts

Pentair is often considered the "gold standard" for pool professionals, and for good reason. Founded in 1966 (originally by five inventors making high-altitude balloons!), the company has evolved into the global leader in smart, sustainable water solutions. For the DIY homeowner, Pentair represents the intersection of rugged durability and silicon valley-tier technology. They pioneered the Variable Speed Pump revolution with the IntelliFlo®, saving American pool owners millions in energy costs. Today, their ecosystem focuses heavily on automation, allowing you to control your pump, heater, lights, and chemistry from a single app. While they are a favorite among professional builders, their "EC" (E-Commerce) line of equipment allows homeowners to access pro-grade technology with valid warranties for DIY installation.

Why We Trust Pentair Pool Products and Parts
Energy Efficiency Leaders: Recipient of the ENERGY STAR® Partner of the Year award for over a decade; their pumps are designed to pay for themselves in energy savings.

Smart Automation: The Pentair Home App and IntelliCenter systems offer best-in-class control over your pool ecosystem from anywhere in the world.

Professional Pedigree: The brand most often recommended and installed by pool builders for high-end residential pools.

Eco-Conscious: Dedicated to reducing water waste and energy consumption through "Green" technology innovations.

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