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.
Rob & Kelly, Bella & Brady (Miniature Schnauzers)
2016 Eagle 323LKTS
2016 Ram 2500 6.7L CTD
2015 White Hawk 29REKS Summit Edition (Traded)