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Post Onsite · Fuel System
HH031-0032
In stock · ships from Knoxville
This is a replacement diaphragm for a Betts cargo tank vent, commonly used on fuel transport trailers.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
The diaphragm flexes to open and close the vent, regulating pressure and vacuum inside the tank to prevent over-pressure or collapse. When the diaphragm becomes worn, cracked, or stiff, the vent may not seal properly, leading to vapor leaks or unsafe pressure buildup. Replacing the diaphragm restores the vent's ability to protect the tank and comply with DOT requirements.
Part Number: HH031-0032
BETTS VENT DIAPHRAM
Unit: ea
Dealer: Post Onsite
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