owenandkathy

Fairly new to RV, and seem to have a lot to learn yet. My present problem is rinsing the black tank. I have a 2017 Keystone Hideout. I hook up the hose and have water to the trailer, but does not flow to tank. The black tank outlet is wide open. I have a picture of the valve others have mentioned under the sink, but cannot figure out how to attach to this message. I see the direction of water on the valve housing, but dont know which way it should be going.