Pentair Manual Air Relief Assembly for FNS, Nautilus Plus, SM & SMBW 4000 Filters — Part 273550

Pentair Manual Air Relief Assembly for FNS, Nautilus Plus, SM & SMBW 4000 Filters — Part 273550

Marsoni

M251S

$84.99

Get it in 3 business days with 1 day shipping. Friday, May 29

Pentair Manual Air Relief Assembly for FNS, Nautilus Plus, SM & SMBW 4000 Filters — Part 273550The genuine Pentair 273550 Manual Air Relief Assembly is purpose built to safely release trapped air from your pool or spa filter tank, protecting against excessive pressure buildup and promoting steady filtration output. This assembly incorporates a manual air release valve along with a pressure gauge and is specifically compatible with Pentair FNS, Nautilus Plus, SM, and SMBW 4000 series filters. Manufactured from tough, chemical resistant materials

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This is one of my little girl's favorite toys. She's an aggressive chewer so at first we followed the manufacturers instructions not to let her use as a chew toy. It was purchased in January 2025, but it's holding up just fine. She likes to turn it into a pretzel for some reason, but hey it keeps her entertained! Highly recommend.

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Reviewed in the United States on May 3, 2026

Verified Purchase

Kevin Rubel

Phoenix, US

★★★★★ 4

Good for play but don’t leave out to be chewed on

With two labs we need durable toys. This can stand up to the teeth when pulling but we can’t leave it laying around or it has chunks chewed out of it. And it’s not the toys fault that my girls can’t figure out how to each take a side, so it’s a human vs dog pull toy.

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Reviewed in the United States on September 27, 2025

Verified Purchase

Lisa Schnepf

Port Orchard, US

★★★★★ 5

Toy is strong enough for a Rottweiler.

This is one of my dog’s favorite toys. He is a Rottweiler so I have to get him strong, sturdy toys. He hasn’t broken it yet!

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Reviewed in the United States on May 18, 2026