Hi ,
We recently purchased our second 16 ft scamp a couple months ago and discovered she needed to have a little more work done on her than we originally had thought such as the shower drain pump needed to be replaced as the first one had frozen .....
We are planning on doing some winter camping but have concerns about how the pump is placed underneath our little scamps shower ....We are thinking that I might possibly have to build a box around her pump to protect her from the cold is there anyone else that has ran into this situation and is there any other alternative solutions rather than having to build a box around the drain pump ? 
Hey Steve,
Interesting question. Bigfoot, Escape, Oliver are some of the only brands in my recollection that offer 4 season packages. Usually, that includes extra insulation, dual pane windows, and sealed/heated tanks.
I have had my Scamps down in the 20's overnight with no freeze issues on the tanks, but not consistently in temperatures below freezing. I've not had a model of trailer with a shower drain pump so no experience with that item. From your picture it seems rather vulnerable though.
Since the 4 season technique is to enclose tanks in insulated space and most add some type of heat flow to the tanks, my vote would be to design an insulated enclosure for the pump.
This of course, still leaves your water, gray and black tanks susceptible to freeze on the Scamp. I know some when winter camping don't fill or use any of the tanks and leave them winterized, but that doesn't allow for self-contained winter use.
Our Trailers:
2015 19 Escape
Buying or Selling Molded FG Trailers:
Fiberglass-RV-4Sale
We have done all season camping in several various RV's and never had to deal with a shower and bath sink drain pump ....I really prefer not to have an electric drain pump to worry about freezing or running the battery down when off the grid ....Has anyone ever possibly lowered the gray water tank or in anyway been able to get by without the drain pump ?
Steve and Sandy
1998 Scamp 16 Ft Deluxe
1973 Boler 13 Ft project
2000 Ford Expedition
Anacortes ( Guemes Island )
Washington
The early 16's did not use a shower drain pump. You had to have a floor drain with a screw in plug or you may grey water in your shower floor if not careful. The shower drain entered the tank down near the 3" output drain of the tank. Just about a cup of antifreeze after a shower is all you need to protect your trap and pump. The straight shower drain hose worked but not very well.
Eddie