If you connect hot water from the bath hot water faucet to the branch side, it is easy to pour hot water into the washing machine. I am useful for washing work clothes. If this is not there, you have to process the water supply hose of the washing machine and connect it, it is quite troublesome. (In fact, it is connected to the washing machines which took time and effort on the first washing machine) Check valves are attached, and it is safe also in case of missing couplers by any chance. Attachment of hot water supply hose and water supply tap is required separately though.