Montana Owners Club - Keystone Montana 5th Wheel Forum - View Single Post

sreigle · 10-25-2008, 06:26 AM

Adamsfamily, I think you are referring to the change that moved the water lines in the belly to their own insulated channel between the floor and subfloor. Older models had the lines running in the open part of the belly, often laying on the steel frame where they would more quickly freeze.

The only way I know for sure to tell is to take a look. You should be able to remove three or four screws from the belly pan and shine a light inside to see if you see water lines.

Another way to tell... if you have low point drains hanging below the belly but not at the water connection center, then your lines are laying in the belly. If your low point drains have valves inside the basement storage area with the pipes hanging below the belly at that point, I'm not sure and you'll need to look. If your low point drain valves are in the water connection center (only newer models have this connection center) then chances are good you have the insulated lines. But I'd still look to make sure.

Even if you have the older style with lines loose inside the belly, you'll be ok if the furnace runs occasionally. The exception is if you have the low point drains hanging below the belly. These usually do not have valves, just a cap on the end of the line below the belly. There will be two lines, next to each other. My experience with these on our 2003 Montana was they'll freeze solid at around 22 degrees (that cold for a few hours) despite the furnace running. These freeze outside the belly but then tend at that temperature to freeze up into the belly where they tee into the main lines. At that point the frozen water blocks the flow thorugh the main lines. If this happens to you, a hairdryer will thaw them out. Insulating those low pint drains didn't do the job for me. I ended up heat taping them, the part below the belly, then wrapping that with insulation and duct tape (to keep it all together). I wired the electrical cord from the heat tape so it would not drag the ground and left those low point drains heat taped year round.

Good luck. Your question is a good one. I have no idea exactly when the switchover took place.

10-25-2008, 06:26 AM	#4
sreigle Montana Master Join Date: Nov 2002 Location: Oceanside Posts: 20,028 M.O.C. #20	Adamsfamily, I think you are referring to the change that moved the water lines in the belly to their own insulated channel between the floor and subfloor. Older models had the lines running in the open part of the belly, often laying on the steel frame where they would more quickly freeze. The only way I know for sure to tell is to take a look. You should be able to remove three or four screws from the belly pan and shine a light inside to see if you see water lines. Another way to tell... if you have low point drains hanging below the belly but not at the water connection center, then your lines are laying in the belly. If your low point drains have valves inside the basement storage area with the pipes hanging below the belly at that point, I'm not sure and you'll need to look. If your low point drain valves are in the water connection center (only newer models have this connection center) then chances are good you have the insulated lines. But I'd still look to make sure. Even if you have the older style with lines loose inside the belly, you'll be ok if the furnace runs occasionally. The exception is if you have the low point drains hanging below the belly. These usually do not have valves, just a cap on the end of the line below the belly. There will be two lines, next to each other. My experience with these on our 2003 Montana was they'll freeze solid at around 22 degrees (that cold for a few hours) despite the furnace running. These freeze outside the belly but then tend at that temperature to freeze up into the belly where they tee into the main lines. At that point the frozen water blocks the flow thorugh the main lines. If this happens to you, a hairdryer will thaw them out. Insulating those low pint drains didn't do the job for me. I ended up heat taping them, the part below the belly, then wrapping that with insulation and duct tape (to keep it all together). I wired the electrical cord from the heat tape so it would not drag the ground and left those low point drains heat taped year round. Good luck. Your question is a good one. I have no idea exactly when the switchover took place.