Shelco-(12021-SB-B) Gasket for 12FOS, 12SD, & 12UD Series, Buna (Swing Bolt Style) 000 Gal 1 lb KDF-55/GAC Carbon - Chlorine & Heavy Metal Reduction Filter Engineered specifically for use with

Engineered specifically for use with old-style 1" Mazzei injectors

8" diameter × 10" length Application Residential reverse osmosis systems Replacement Interval 24-36 months depending on water quality Operating Pressure 40-80 PSI recommended

Extend Cartridge Life

corrosion-resistant water line connections in filtration systems and plumbing installations

Shelco-(12021-SB-B) Gasket for 12FOS, 12SD, & 12UD Series, Buna (Swing Bolt Style) 000 Gal 1 lb KDF-55/GAC Carbon - Chlorine & Heavy Metal Reduction Filter Engineered specifically for use withThe Shelco 12021 SB B is a Buna N gasket engineered for swing bolt style housings in the 12FOS, 12SD, and 12UD filter series. This replacement seal ensures proper housing compression and leak free operation in commercial and industrial filtration systems. TECHNICAL DETAILS Gasket Specifications Part Number 12021 SB B Material Buna N (Nitrile Rubber) Housing Style Swing Bolt Compatible Series 12FOS, 12SD, 12UD Manufacturer Shelco Filters Application