What is a coupling and how do I make one?
A coupling is a connection between two pieces of pipe or tubing. To make a coupling that reduces in size for a fountain especially a tabletop fountain. Cut a 1″ or 1-1/2″ piece of tubing that’ll fit snugly over the pumps spout. Then use a smaller tubing as the main tubing that’ll go up through your fountain. We do this here a lot of the time by using a 5/8″ OD tubing cut 1″ and then sliding a 1/2″ OD tubing into the 5/8″ tubing. We get more pressure from our pump without having to “up” the GPH of a new pump!