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Betts · Air System
6496ALB
In stock · ships from Knoxville
This is a pressure vacuum vent (PPV) for DOT406 manhole dome lids used on gasoline and chemical tank trailers.
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Verified fitment for 2 applications
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Fits standard DOT406 full‑opening manhole covers equipped with a PPV vent port. Verify compatibility with your dome lid model and mounting bolt pattern.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 2 of 2.
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It automatically relieves excess pressure or vacuum inside the cargo tank to safe limits, preventing tank damage or collapse. You replace this vent when the Buna‑N sealing disc becomes worn, cracked, or fails to seal, or if the vent no longer opens/closes at the specified pressure settings. It's a mandatory maintenance item to keep the tank trailer compliant and safe for transport.
Part Number: 6496ALB
PPV VENT
Unit: ea
Dealer: Post Onsite
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