For what it's worth, here's my rig. Water hose fitting x QD, plus the blow down rig. Even though I set the compressor to 40, I like to know what's at the inlet. So, valve and gauge. Never have used the pink stuff. BUT, our scenario is a little different. During the winter months, I'll blow the lines out before leaving for offshore where my wife doesn't have to fool with it. But, the rig is also indoors in a big shop, small thermostat controlled heater is inside the camper set pretty low, all cabinet doors open to allow air circulation etc. Overkill maybe, but too easy not to do. Won't go into everything else we do, but there's a LOT more in the winter months.
John and Rebecca Dickson
Emma-8 / Little John-5 / Iva-1+
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)