QMP502M-1/2 is a 1/2 Metric Compression 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 pin out. Simply push
the pin back in to return to regular tap water.