Firstly, the wrong screw connection from the manometer to the tank. I had to send it back at the time (my bad), went to where I was originally supposed to buy it and bought the correct fittings. That's when I found out how bad it is. I removed the kgf/cm meter to avoid damaging it by removing the fitting. The gauge was filled with thread sealant along with the air intake. This seal is like cured super glue. There's no way to get everything out that makes the sensor useless, useless, useless, now in my copper waste bin. It looks good when you don't need it to work!