Water flow adjuster connects to tubing so you can regulate the water flow easily

Inline water flow adjuster is 2" long and connects to tubing 5/8"OD x 1/2"ID
Simply turn the top handle to adjust the water flow

You can also go down in tubing size by making a coupling 5/8"OD x 1/2"ID down to 1/2"OD x 3/8"ID 
Perfect for most any fountain where you need to regulate the water flow beside the adjustment on the pump.