It's to let air out of the tire if you accidentally overinflate. It's in the manual. The manual is your friend ----------Erich_33406 said:Thanks , Mine expires Dec. 2019. I figured most of it out, now just have to figure out what the Top most button is for, the one that's above the Pressure Gauge on the 2015 SRX inflater.
Yikes! Mine expires this month! Anybody replaced theirs and can give me an idea on cost?Nice Ride said:Remember, that can of sealant needs to be replaced. I am pretty sure it has an expiration date on it.