Thanks for mentioning that Haze. I have one underground pipe I use to get either water or compressed air to the poolhouse. If you're good at soldering you can make adapters from standard brass garden hose repair fittings to quick disconnect air fittings. Nice thing about those air fittings is they have a coarse thread, 1/4 or 3/8 NPT I think, and you can drill a hole in a PVC endcap or pipe and use the fitting to cut a thread in the PVC to make any kind of adapter you want.
Al