I thought I would relate my experience with broken hot water heater lines with anyone that might be interested in preventing the flood problems I've had. This might pertain only to Fleetwood owners, but any RV that uses the Attwood Water Heater is subject to the problem.
My first flood was during a trip through Virginia, in June of 2009. We were camped in Virginia Beach, and were getting ready for bed. The DW walked into the bedroom and felt water oozing up, through the carpet and wetting her feet. Our whole bedroom was flooded.
Long story short, we maded it through the night and I called a mobile RV tech the next day. What had happened, was the hose fitting, mating the hot water pipe, from the heater, to the house water line had cracked, split and fell off the heater, gushing water everywere. It took most of the day, for the tech to locate the problem and replace the $10.00 hose. Total cost, approx. $350.00.
Yesterday, about two years later, we are camped in my son's yard for a week and the same thing happened, with the same heater hose that was replaced before. We didn't know about a leak, until I went to walk the dogs and saw water, running (actually gushing) out of three storage bays,on the passenger side and under/near the water heater. I immediately turned off the water supply, but the bedroom was already flooded.
This morning, I searched for the leak and ultimately found the same water hoseline/fitting broken. Since the water line has a plastic fitting, where it connects to the water heater, my opinion is that as it expands and contracts during the use of hot water (and/or the weather effects), the plastic can't take it an finally cracks (after 2 years, with me). Soooo, beware all of you, with Attwood water heaters like mine!
P.S. The tech in 2009, managed to replace the hose fitting W/O removing the water heater. However, I tried, but I am going to have to take the RV to a shop, because due to it's location, I think the W/H will have to be pulled out.