I have installed a pressure gauge in my water system but it doesn't seem to work. It's plumbed into the copper tubing so I know there is pressure on it. The gauge, which I picked up in a bargain bin, has two scales, each covering
50-350 psi... One is labelled LEG CURL and the other LEG EXT. The gauge also has what looks like two set screws, one on either side of the dial housing and two more screws on the back. a)Is the gauge defective b)Is it the wrong kind of gauge or c)Does it have to be adjusted somehow. Thanks ds