{"product_id":"172855-pentair-nautilus-plus-fns-de-filters-air-vent-strainer-3-4","title":"Pentair Nautilus Plus \u0026 FNS DE Filter 3\/4\" Air Vent Strainer — Part 172855","description":"\u003cp\u003eThe Pentair 172855 Air Vent Strainer is a factory-original 3\/4-inch stainless steel component engineered for Pentair Nautilus Plus and FNS D.E. pool and spa filter systems. This strainer functions as a protective screen that blocks debris from entering the air valve tube, shielding delicate internal parts and preserving peak filtration performance. Its stainless steel construction delivers outstanding resistance to corrosion, even under prolonged contact with chlorinated water and elevated system pressures. By keeping the air relief pathway clear and unobstructed, the strainer promotes stable system operation and reliable pressure management. Designed as a direct drop-in replacement, it installs quickly and keeps your filter running at its best.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch1\u003eKey Benefits\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion-Resistant Construction:\u003c\/strong\u003e Made from 3\/4-inch stainless steel, the Pentair 172855 delivers superior longevity and withstands chemical and environmental wear common in pool and spa settings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtects Air Valve Tube:\u003c\/strong\u003e Serves as a frontline barrier against debris intrusion, safeguarding the air valve tube from clogs that can disrupt airflow and compromise filtration efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintains Uninterrupted Air Flow:\u003c\/strong\u003e Keeps the air relief vent free from blockages, enabling proper pressure venting and balanced hydraulic operation throughout the entire filter system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM-Designed Fit:\u003c\/strong\u003e Precisely manufactured for Pentair Nautilus Plus and FNS series filters, this strainer drops into place without any modifications, simplifying replacement and routine upkeep.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCritical for System Longevity:\u003c\/strong\u003e By intercepting fine debris before it reaches sensitive air channels, this strainer helps preserve long-term filter health and reduces the need for unscheduled maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch1\u003eWhat's Included\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003ePentair 172855 Air Vent Strainer\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch1\u003eCompatibility\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003ePentair Nautilus Plus DE Filters\u003c\/li\u003e\n\u003cli\u003ePentair FNS DE Filters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch1\u003eSpecifications\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Pentair\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 172855\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch1\u003eSEO Tags\u003c\/h1\u003e\n\u003cp\u003epentair 172855\u003cbr\u003e172855\u003cbr\u003e172855 pentair nautilus plus filters\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":47546758201595,"sku":"172855","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0727\/9021\/2859\/files\/81TablITKcL._AC_SL1500.jpg?v=1768940823","url":"https:\/\/poolst.com\/products\/172855-pentair-nautilus-plus-fns-de-filters-air-vent-strainer-3-4","provider":"Pool St","version":"1.0","type":"link"}