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« on: October 28, 2019, 12:31:23 PM »
for 15 years wintering in 30 below weather, all I do is remove the hot and cold connections from the hotwater heater, connect them together (bypass) with a double ended barb, and open the petcock on the heater, yes may be a little left in there but plenty of room for ice expansion, sometimes, after bypass, I install a hose from the pump to a gallon of pink stuff and run pump till the faucets show pink,
sometimes I get lazy and open the front water tank, vacuum whatever water is left in the tank, put a couple gallons of pink stuff in the forward tank, pump it till pink stuff comes out all the faucets, then vacuum out residual pink stuff from the tank, done,,
aft tank I simply remove the hose from the valve under the counter and let it drain, no pink stuff needed for the aft tank, one year I pumped vodka through the lines, one year I used compressed air, very simple system to winterize,
I toyed with the idea of installing bypass valves but removing and connecting the hoses is so fast and easy i talk myself out of it. I have never pumped pink stuff into the hot water heater, soooo easy to bypass, I have stubborn friends who still fill the entire hot water tank with the pink stuff, I just think, what a waste.
I had a year that after pump out, I left the holding tank through hull open while in the water, as they were going to pull boat that afternoon and i had to leave , in the spring I noticed the holding tank was completely full of water, must have filled up from the lake before they pulled the boat, froze during the winter and it didn't hurt a thing, lucky im thinking, I know all the thru hulls should be open during winter storage, wasn't thinking the holding tank would fill while in the water. I know now