I bought a bigger air tank for my on board air supply, I'll valve it off and use the small Hadley air horn tank when around town here, but when I hook up and hit the road, I'll open the valves, as I have an air chuck on the rear bumper for my air hose. This 3 gallon tank will inflate a tire quick.
Besides....I just may weaken and get the train horns...........
Broome, did you win the auction on E-Bay? Those Kong Horns RULE.
A messy work table is a happy work table....
New 3 gallon air tank for truck