QMP500 is a 1/4â€, 3/8", or 1/2" Barb 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 barb on the side of the diverter valve 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.
(NOTE: SIZE REFERS TO TUBING'S OUTER DIAMETER, NOT SIZE OF BARB)