6 Inch Check Valve - 381 items
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6 Inch Backdraft Damper, HG POWER 3-in-1 Damper, Flange, Duct Adaptor with Butterfly Back Check Valve for Kitchen, Panel Size: 8", Compatible Duct Size: 6"-7"

NIBCO - NLN10XK W910B-LF/W960B-LF Silent Wafer Check Valve Lead-Free, Class 125, Iron Body, Bronze Seat and Disc, 6"

QuQuyi ABS 5" 6.6” Inch Backdraft Damper Check Valve One-Way Valve, Draft Blocker Wall, Butterfly Valve for Dryer Duct Hose with Inline Spring Loaded (Updated-White, Fit for 5"-6.6" Duct Openings)…
