Abstract: Energy saving systems for a commercial laundry utilizing a plurality of machines wherein a simple diverter valve directs the effluent from the machines to either a waste area or a recycle tank. In one embodiment a system of troughs in the floor of the laundry are provided to collect the effluents from the different machines are directed to one or the other by the diverter valve. In the second embodiment, a self-contained modular device is provided, but again with separate diverter valves to control the effluent of each machine. Numerous optional features and many combinations of the features are possible.