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What is the primary purpose of the 4n1 81721 Rain Collar?

HVAC
Ventilation and Exhaust
Roof Flashing
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DK Hardware 2026-09-29 - 21:25:20
Technical Team

The 4n1 81721 Rain Collar is designed as a repair solution for leaking elastomer sealing collars on residential no-caulk roof vent flashings, providing an immediate, temporary seal during wet conditions.

Product Details

Rain Collar, Fits 1-1/4" To 4" Pipe, Roof Flashing Accessory, 3" Height, 4.5" Length, 4.5" Width, Residential Roof Vent Repair
817214n1 81721 Rain Collar, Fits 1-1/4" To 4" Pipe, Roof Flashing Accessory, 3" Height, 4.5" Length, 4.5" Width, Residential Roof Vent Repair
$4.32/Each

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