bigredhdt Posted March 19, 2015 Report Share Posted March 19, 2015 On my VNL 630 there is an air fitting with about 5 lined on the inside of the frame rail even with the battery box on the driver's side. Anyone know what that does? Link to comment Share on other sites More sharing options...
Mark and Dale Bruss Posted March 19, 2015 Report Share Posted March 19, 2015 Air distribution. Please click for Emails instead of PM Mark & DaleJoey - 2016 Bounder 33C Tige - 2006 40' Travel SupremeSparky III - 2021 Mustang Mach-e, off the the Road since 2019 Useful HDT Truck, Trailer, and Full-timing Info atwww.dmbruss.com Link to comment Share on other sites More sharing options...
bigredhdt Posted March 19, 2015 Author Report Share Posted March 19, 2015 So, not supposed to have air coming out of sides? Link to comment Share on other sites More sharing options...
bigredhdt Posted March 19, 2015 Author Report Share Posted March 19, 2015 I think it is a pressure protection manifold. Link to comment Share on other sites More sharing options...
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