View attachment 205342
I got a Factory dry pipe and when I took it off, I ran air compresser through it to understand it better. Here is how it went....From pump the water would enter #1 then through the walls it would travel to #2 and #3, from #2 you run a hose to #4 with a an option of water filter and water control valve because that water goes into the exhaust and water box and out the ski, now the water from #3 goes to the pisser and out (I put a adjustable valve on that line to control the temp of the pipe).
Someone correct me if I'm wrong....