Changes any faucet into a flow control faucet! Simply add this adapter in between your tap and shank, then you can adjust the flow with an allen wrench. Once adjusted, the flow is locked in and cannot be accidentally changed. This adapter will fit most shanks.
To make adjustments, first loosen the top and bottom hex head screws with the allen wrench. Turn the middle ring to adjust flow restriction. Open your faucet to test the flow restriction and make further adjustments if needed. Once the desired restriction is dialed in, retighten the top and bottom screws.