Product review (5 stars): Great product
Used it to convert my air gap faucet to a non air gap faucet.  We'd had problems for years with the air gap faucet as it was always getting food particles in the drain line from the garbage disposal. That plugged the drain line and water leaked out the vent hole.  I installed this a month  ago and haven't had a problem since.  The air gap faucet was much noisier also. No noise detected with this one when the RO filter is cleaning.