This was just what we needed to replace the previous gauge that we had left outside when the outside temperature dropped a degree or two below zero. We drained the hose and gauge and left it hanging over the electric meter to continue draining the hose and gauge. Bad plan, should have brought the sensor in. Apparently there was still enough water in the pressure gauge that when it was reconnected it couldn't read any more pressure. This new pressure gauge replaces our existing and relatively new pressure regulator. Always take a pressure gauge with you when you get cold. Even if you think there is no water in the pressure gauge, there may not be. I know that now.
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