Yep, There is a 30 gallon clean water tank under the sinks with a water pump and 6 Gallon hot water heater. The grey water tank is mounted under the trailer.
It also has a straight water hose input that bypasses the tank which is nice.
Outside, right behind the sink, we had them mount an outdoor shower faucet. That way, at competitions, I can just bring my camping-shower-tent-thing and take a nice hot shower after turn-ins.