Newbie mistake, after 4 years...

bigred1cav wrote:
Are you saying the outside shower faucet is draining the HW Tank due to it being open or just as a fact of the outside faucet being there will drain the tank?

wa8yxm wrote:
Don't feel too bad.. I was in the Family center at a campground doing coffee (they provide) and internet one morning and a fellow camper was telling me how he was getting ready to call an RV service tech.. he'd already gone the water heater company customer assistance route......

I ask him about the outside shower

he called the RV tech back and cancelled.

No loss in water, rather the faucet itself having both valves open into a common outlet allow the hot and cold water lines to crossover to each other. When you take a shower inside and demand hot water, cold water sneaks into the hot water line through that outside faucet resulting in you only getting warm water at best in the shower, even with only the hot on.