[Shane826]

Bill-

If you have pretty much any toilet that has a fresh water flush supply, just draining isn’t enough. You need to get antifreeze through the flush valve. I speak from experience; the flush valve froze and cracked the first winter after I installed the SeaLand. If you use antifreeze, you’ll want to bypass the water heater otherwise that’s an additional 6 gallons of antifreeze to winterize the hot side plumbing. With a bypass you can winterize the entire plumbing system with one gallon, plus another gallon into the P-traps and tanks. I bet now that the SeaLand is available as original equipment they start adding a water heater bypass on new TMs and change the language in the owners manual real soon.