OEM Pentair 273550 Manual Air Relief Assembly is designed to safely vent trapped air from your pool or spa filtration system, helping prevent pressure-related issues and supporting consistent filter performance. This air relief unit includes a manual release valve and pressure gauge and is specifically compatible with Pentair FNS, Nautilus Plus, SM, and SMBW 4000 series filters. Constructed from rugged materials for durability in demanding aquatic environments, it promotes efficient system operation and contributes to filter longevity. Its straightforward installation makes it an essential component for pool techs and advanced DIYers maintaining proper system pressure and flow.

• Critical Safety Function: Relieves trapped air in filter tanks to prevent excess pressure buildup and support safe filtration operation.

• Optimizes Filter Efficiency: Ensures smooth flow and maximum media performance by maintaining internal system balance.

• Broad Filter Compatibility: Designed for use with Pentair's FNS, Nautilus Plus, SM, and SMBW 4000 series filters.

• Built for Durability: Constructed to handle chemical exposure and outdoor conditions common in pool system installations.

• Includes Gauge Assembly: Ships with both air relief valve and pressure gauge for a complete OEM replacement setup.

• (1) Manual Air Relief
• (1) Pressure Gauge

• Pentair FNS Filters
• Pentair Nautilus Plus Filters
• Pentair SM and SMBW 4000 Series Filters

Need help replacing the Pentair Manual Air Relief 273550? This guide answers walk-in purchase, in-store install, and filter safety questions for Pentair FNS, Nautilus Plus, SM, and SMBW 4000 systems.

Buying and Installing from Your Local Store

This section covers walk-in purchasing tips and how to install the 273550 safely for optimal air release.

Can I buy the Pentair 273550 air relief in store and install it the same day?

How do I install the 273550 air relief assembly on a Nautilus Plus filter from in-store stock?

What tools do I need to install the manual air relief after local purchase?

Preventing Pressure Buildup and Leaks

Helpful advice on using the part correctly after walk-in install to maintain safety and performance.

How do I use the 273550 air relief valve to prevent filter pressure problems?

Why is air building up even after installing the in-store Pentair 273550?

What should I check if the 273550 relief valve leaks after walk-in replacement?

Filter Compatibility and Upkeep

Tips for using the correct part on different filter models and maintaining system efficiency.

Will the Pentair 273550 air relief fit all FNS filters sold locally?

How often should I check or replace the pressure gauge on the in-store bought 273550?

What signs suggest itÕs time to replace the air relief I bought in store?