Pentair Black Manual Air Relief Assembly | SM & SMBW 4000 Series D.E. Filter, FNS Filter, Nautilus Plus Filter | 273550Z Filter Connecting Hoses The "-M" designation identifies this

The "-M" designation identifies this as the Microban antimicrobial variant of the standard PMA40L-F2M

If you intend to install FireFighter1 yourself

Reduces or Eliminates Chlorine and Bromine in Water

The Pentair parts catalog lists part 520008 as a bag of 100 connectors

Always wear protective gloves and eyewear during application

Pentair Black Manual Air Relief Assembly | SM & SMBW 4000 Series D.E. Filter, FNS Filter, Nautilus Plus Filter | 273550Z Filter Connecting Hoses The "-M" designation identifies thisOEM 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