The Jimbonaut said:Dude, my petcock is kinda knackered (gaskets shot, full of rubberized varnish) and I'm thinking to replace it with a straight exit petcock. Pretty sure the thread on the tank's spigot (is that what it's called?) and the OEM petcock's bolt thread is 16.9mm but having a hard time finding any replacements. Is there an adaptor or fix so that I can use a wider range of petcocks - without welding anything?