We just bought a 2011 MPG 185. We picked it up and then did a tour of 11 days in it. It was a crash course on how-to do just about everything. You sure learn a lot on the road living in a trailer you know little about! Where we were the weather was good/warm but we live in snow country and we are home now. The Owner's Manual provided by Hearland which I downloaded from the site, is good but not MPG specific and therefore lacking for virgin RV owners like us. It took us 3 days to figure out how to get hot water when we bought it and another couple of days to figure out how to shut down/drain it when we got home. But we got there. This forum is a blessing because every time I need to figure something out that is not in the manual, I do a search here and learn how it is done. So thanks to everyone for your input on all things.
I've drained everything, run the pump, got out as much water as I apparently can but I'm still not comfortable that it is a done deal. I haven't found where the pump is yet and that accounts for my lack of comfort ..... That is tomorrows task to look for it. Even if I get all the water out of hoses, hot water heater, pump, I still have the p-traps and I've put anti-freeze in them already. I'm glad someone mentioned the shower hose -- that it holds water -- I will make sure I drain that tomorrow, too.
By the way, my MPG's water heater and furnace is under the dinette/bed under a wood panel but it is not screwed down. It actually has a hole for your finger to lift it out. It's very easy to access. That is where the HW Heater bypass and hot/cold shutoff valves are located in my unit.