Thats the whole point Dave, I clearly explained what I had, I have some experiance with this as I live in the sticks and installed a lpg gas hob in my kitchen, so when I got the box back home and eventually looked at the valve it was just that a valve not a regulator. If they had sold this to somebody else who took them at there word, they would have just installed the valve on top of the copper pipe, without the regulator. The changeover system I have on my house is a 2 in 1 valve and regulator, which when I was fisrt talking to the salesmen, this is what he was intumating at.