Look under sink - if not then look where water cylinder is failing that then trace flow and return pipes as best you can. It will be connected somwhere, maybe another pressure gague is fitted close to it.
Stewiesnake
March 2010
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.