In 2006 we sold our house to buy our houseboat. That essentially made us homeless, so we bought a 2004 Challenger 5'er, 36'er, 3 slides, pretty nice digs. It was touted as a "4-season" unit, and for the most part it was... However, the weak link was the plumbing drain valves, which were below the kitchen sink and protruded into "air". When it got below 15° out, we'd lose all water to the kitchen. Not good. Took 1/2 hour with a heat gun to get the ice to melt. I eventually boxed in the bottom with 2" styrofoam, which worked-- up until a 6° morning, and we were froze up again...
2000 40' Tiffin Allegro Bus \ 2003 Chaparral 260 SSI
1988 53 x 14 Skipperliner \ 1995 32' Party Cruiser
1984 Goldwing Aspencade \ 1976 Harley Sportster