hi there, i am trying to hook up the water and drain lines. there are 2 ports, one is on the pump and the other is a white plastic port beside the pump. the 2 hoses are different sizes. one hose has a black molded rubber elbow and it fits the port at the pump. is this the water inlet??? i have been told this is the drain. if so does the ribbed plastic line for the water inlet just clamp to the plastic port.when i hook up the molded hose the washer just fills up and there is no way to stop it other than shut all water off. can you help me?? the molded hose says " check valve" and has an arrow pointing into the port.