Wow, OK. So it looks like Northern Tool sells a RapidAir 3/4 NPT kit (didn't see much 3/4 stuff at tractor supply). So I would use a 3/4" NPT whip hose into the 3/4" Rapidair PEX piping, with roughly the depicted drain valves, main lines, and feeder lines depicted in diagram 1 above??? When I...