Review on 🔄 PIC LP1 254 20X35 Connection - Enhanced Internal Design for Easy Filling by Jay Matlock

I wanted to know the filling pressure in my diesel tank. The pressure/vacuum release valve releases air at 8 oz/in² and vacuum at -1 oz/in². This equates to a high pressure of 13.85 inches of water and a vacuum pressure of -1.73 inches of water. So this gauge had the perfect range to tell me if my pressure/vacuum relief valve was working properly. This allows me to check the vacuum when refueling and observe the increase in pressure in the tank under the influence of the daytime sun. I put a sticker on top of the tank with a chart to convert inches of water to ounces/sq.in.