I wanted to see what pressure the Onan was holding. i noticed when changing the filter there was a sending unit with wire attached already in there. I'm thing that is a kill switch for low pressure. So I gathered up a gauge and installed it. I don't normally cut into dash panels, but I wanted the gauge where I could see it. I did get a short pipe nipple and tee to keep the original sending unit hooked up.
Anyway, I chose a spot on the dash and cut a hole. Got it all hooked up. It doesn't have as much pressure as Big Bertha, But I can at least monitor it now.