The HydroMaster drum proportioner automatically mixes OX chemicals with water, then dispenses the diluted solution into desired container. This in turn eliminates the need to need to tip the drum in order to pour the contents. The automatic dilution feature ensures the OX concentrate consistently delivers maximum performance while also reducing exposure to the concentrated chemical. The HydroMaster uses water power, not electricity, so OX concentrates do not have to be located near outlets. This system connects directly to building water supply.