The Andersen Valve on my bighorn went out on me when we were dry camping last week. It was bypassing between the pressure and tank side of the valve so the pump would try to fill the tank when I was in Normal mode. Had to run to a hardware store and get a couple fittings, caps, and chunk of line to bypass the valve so the pump pulled direct from the tank. On the plus side, even though I'm out of warranty now the customer support at Andersen was great and they sent me out a new cartridge to repair it with, no charge, with an assurance the new part is much more reliable and I didn't need to purchase a backup valve just in case. Can't speak to the reliability of the new part yet, but the company has very friendly and helpful folks that are ready and willing to make things right.
2015 Ram 3500 Laramie CTD, 4X4, AISIN, B&W Companion Puck Mount
2016 Heartland Bighorn 3270RS, 1kw solar with Trimetric and dual SC2030, 600 watt and 2k inverters.