Pentair Black Manual Air Relief Assembly | SM & SMBW 4000 Series D.E. Filter, FNS Filter, Nautilus Plus Filter | 273550Z
Pentair Black Manual Air Relief Assembly | SM & SMBW 4000 Series D.E. Filter, FNS Filter, Nautilus Plus Filter | 273550Z
Pentair Black Manual Air Relief Assembly | SM & SMBW 4000 Series D.E. Filter, FNS Filter, Nautilus Plus Filter | 273550Z

Pentair Black Manual Air Relief Assembly | SM & SMBW 4000 Series D.E. Filter, FNS Filter, Nautilus Plus Filter | 273550Z

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SKU:
273550Z
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About This Item

OEM Replacement Manual Air Relief Assembly for Pentair D.E. and Cartridge Filters

The Pentair Black Manual Air Relief Assembly (273550Z) is the OEM replacement air relief assembly for the SM and SMBW 4000 Series D.E. Filter, FNS Filter, and Nautilus Plus Filter product lines.

IMPORTANT: CONFIRM COLOR BEFORE ORDERING
This is the BLACK version of the air relief assembly. Pentair produces this assembly in multiple color variants for different filter configurations. Confirm the color on your existing assembly matches Black (273550Z) before ordering — the wrong color variant may not seat correctly in your filter's air relief port.

The manual air relief assembly allows trapped air to be purged from the filter tank before and after servicing, restoring proper water flow and system pressure. A failed or leaking air relief assembly can prevent accurate pressure readings and allow air locks to develop within the filter, reducing filtration efficiency.

Specifications

Pentair Part Number 273550Z
Color Black
Quantity Included 1 Assembly

Pro Tip

Before ordering, locate the existing air relief assembly on your filter and confirm the color matches Black (273550Z). Pentair supplies this assembly in multiple color variants corresponding to different filter configurations — ordering the wrong color variant may result in a part that does not seat correctly in your filter's air relief port. If you are unsure of your filter's model number, it is stamped on the filter tank label.

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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