Pentair Black Manual Air Relief Assembly | SM & SMBW 4000 Series D.E. Filter, FNS Filter, Nautilus Plus Filter | 273550Z Filter Connecting Hoses measure the plastic frame end-to-end

measure the plastic frame end-to-end and exclude the top collar — compare to the 36" length of the FG-1006 to confirm the correct fit before ordering

Always wear protective gloves and eyewear during application

Easy-to-use formula treats up to 600 gallons of spa water and is compatible with chlorine and bromine systems

Brand Equipment Line Model / Part Number Notes Pentair IntelliPro Family 013002 — IntelliPro VS+SVRS Two required per pump

Pentair Black Manual Air Relief Assembly | SM & SMBW 4000 Series D.E. Filter, FNS Filter, Nautilus Plus Filter | 273550Z Filter Connecting Hoses measure the plastic frame end-to-endOEM 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