· Connects to 1/4 inch tubing. This is the size used by all reverse osmosis systems.

· Stops water flow to the drain, forcing the osmosis membrane to work harder and preventing excessive water from being wasted in the kitchen drain.

· Ideal for areas with low water pressure or for reverse osmosis systems that do not have a water pump.

· If you notice that the reverse osmosis system is sending a lot of water to the drain or that the water storage tank is filling very slowly, then you may need this fitting.