The bellows may work on an axle that is on a trailer queen and never gets hot from highway driving.
True, but it says it can be fitted to a hose and put up high too. So maybe it could still work on a driver?
Does anyone know if it's got it's own vent openings or if it's a closed bellows? Never seen them, but if they are closed, then they're simply allowing for expansion and not open to the air. Which means no filter to worry about and no water in and (theoretically at least) no mess.
Not a bad idea really, if expansion is all that's needed, as I suspect might be the case in most instances.
Maybe we've only use open ended fittings, like hoses and filters, simply because we copied how the O.E.'s did it with their minimal cost type budgets.
Not that that's a bad thing...
What do you guys think? Does the vent actually need to "vent", or can it just use some room to expand?
Paul