The gauge is accurate and easy to fit and works well. There is a design problem in its placement in my Rocket as it seems as if water finds its way down into the dial area and calcifies and blocks the pipe. I have had to replace the gauge 3 times in 6 years and this one is a spare. It may be our water that causes the problem but at the tubing is silver soldered to the gauge there is no way of cleaning the pipe.