The Winterize setting should take care of the water heater too. IIRC, the Sanitize setting also bypasses the WH so you don't have to worry about that in the spring either.
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Rob & Kelly, Bella & Brady (Miniature Schnauzers)
2022 Eagle HT 28.5RSTS
2017 RAM 3500 SRW CTD/AISIN CC LB