Lived in the Bay Area for many years.
NEVER had to winterize our RVs.
You don't get enough hours of freezing temperatures to worry about it.
You live in California and use Centigrade for temperatures?😉
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package