Okay bad news, I've hit a potentially project stopping problem, I got all the gas fittings today, the flexi stainless steel hoses etc....I've been selecting the things to be compatible with a a 15kg calor butane cylinder which in the UK uses a 21mm clip on fitting.....trouble is the clip on adapter has a non return valve in it!!!
This kind of kills the entire project as I need to be able to return the liquid butane to the cylinder...which would be stopped by the non return valve
The adapter is completely sealed from what I can see so no way to remove the non return valve.
I may be able to get around this by using a propane cylinder and swap the gas out for butane. In the UK these propane cylinders have a standard tap valve fitting directly on the cylinder....I don't think these have a non return valve in them.
I can get an adapter so I can connect my butane hoses to the propane cylinder so that's not a problem (if only I'd know this at the start I could just gone for propane fitting and saved a lot of money on these adapters!!)
But my question before I spend more out on what is otherwise a dead project is does anyone know for sure whether or not these propane cylinder tap valves have a non return function?
I'm hoping not....I mean they do refill them somehowEdited by technogiant - 8/22/13 at 1:50am