If you are ever camping where there is a potential of freezing I would recommend avoiding PVC. It cracks easily in frost conditions especially when exposed.
I ditched the plastic petcock and installed a 12" brass sillcock designed with the washer 12" from the outlet so cold has to penetrate 12" into the insulated & heated belly before finding any water to freeze.
George & Cathy
08 Titanium 28E33SA, XM, Honda EU 3000is, Trimetric, RotoChocks, LP Reg. Mod, 2 Gal Accum., WiFiRanger GO2/Mobile
04 Ram 3500 5.9 DRW, PAC PRXB E/B, 4" MBRP SS Exhaust, Gauges, Aux Tank/box, BrakeSmart.
ETCS (ss) USN Ret