I thought about that but my air chuck I use to fill tires has a gauge built into it. I put a lot of pressure into the res. just to see if the hose between the res. and the master would blow off but I couldn't get it to even when I tried with a spare I had laying around. The air will start to leak around the threads of the res if you put to much air in or if the cap is not on well enough, you dont need a lot of air to bleed the system anyway.