Great information. I discovered I had a water leak on my EndeavourCat30. I traced it to the Wolter water heater. When I was trying to remove the unit from the boat some of the plastic water fittings and the brass gas fitting broke off. I thought about replacing the wohle unit until looking at replacment costs. A replacment unit was in the 500-1000$ range. I just went to the plumbing store and bought replacment fittings reattached electricial and she fired right up with no leaks. Thanks for the manual. My boat had very little paperwork with it.