Doh, your right it does. a "should have gone to specsavers moment". I assume a registered gas fitter/plumber etc might do it. There is a guy my neighbour used and I will use on the heating side. His name is Michael Fay. He's based on the northside in Raheny. Did a very good job on fixing the neighbours gas boiler and was very knowledgable when I was talking to him. He might at least point u in the right direction if he can't help himself. 087 2590478.