A clever, 2 ball valve system that:
1. Allows air into the tank to replace used fuel.
2. Allows air out due to expansion and
3. Closes off to prevent fuel escaping either by sloshing or roll-over.
63mm overall length. 7mm hosetails.
Should be mounted vertically. With the valve at the top.
IN-LINE FUEL TANK BREATHER VALVE 7mm HOSETAILS #FTBV2