1.05 inch O.D. Bottom Distributor .010" - .013" slots
Used to make Distributor Tube with a piece of 3/4" PVC Pipe ( gluing the distributor to the PVC pipe with PVC Cement ).
This 1.05" O.D. pipe size is used on all new residential valves.
Some older valves used the 13/16" O.D. tubes, but you can still use the larger 1.05" distributor and adapt to your old valve by gluing ( use PVC Cement ) a 6" section of your old 13/16" tube into the center of a piece of 3/4" PVC pipe that is Schedule 40.
NOT a "coupler", but an actual small piece of 3/4" Schedule 40 PVC used as a coupling piece, since the INNER diameter matches the OUTER diameter of the 13/16" pipe.
We also sell the 13/16" distributors and 13/16" pipe.