Hot Tub Manifold Spa 2" X (22) 3/4" Barb Dead End Manifold Kit Accepts 2" PVC Pipe which would measures about 2 3/8" Outside Diameter.. (22) 3/4" Ribbed Barbs Total For a Video about Manifold parts go to YOUTUBE and look for "Spa Hot Tub Barb Style Manifolds The Hot Tub Professor" or " Spa Freeze Damage Repair Manifolds Leak Hot Tub Professor How To Video" or "Spa Hot Tub Flex Pipe Glue In Style Water Manifolds The Hot Tub Professor" Comes with (3) Barb plugs to make the manifolds a 21,20, or 19 Barb See the Informational videos here first. This kit is a 22 Barb with (3) 2" Spigot/Street X 2" Slip X (6) 3/4" Barbs manifolds and (1) 2" Spigot/Street X 2" Slip X (4) 3/4" Barbs with a Coupler Kit. The Kit consists of (4) Manifolds total, (3) with (6) 3/4" Barbs totaling 22 Outputs, a 2" Coupler, 6' of 2" Soft Pipe, (44) 3/4" Clamps and 66" of Clear 3/4" Tube so you have about 3" per extension. The kit is to be used to replace a broken manifold and extend the output side tubes and use the coupler to spin it to win it on the old pipe and then glue the 6" piece of 2" Flex in and then glue the manifolds in from there. The Manifold recieves a 2" pipe or fitting on one side and then slips inside of a 2" fitting on the other side. For a Video about Manifold parts go to YOUTUBE and look for "Spa Hot Tub Barb Style Manifolds The Hot Tub Professor" or " Spa Freeze Damage Repair Manifolds Leak Hot Tub Professor How To Video" or "Spa Hot Tub Flex Pipe Glue In Style Water Manifolds The Hot Tub Professor"