QMP502SLD-P is a 1/4", 3/8”, and 1/2" Compression Plastic Diverter Valve that connects to your kitchen faucet. This diverter valve allows you to switch between the tap water from your faucet and filtered water from the unit. The tubing attaches snuggly to the compression connection and diverts the water to the filtration unit when you pull the slide. Simply push the slide in the opposite direction to return to regular tap water. All plastic diverter valves are lead free.