KEYS just find any adapter that will allow you to connect a garden hose to the water inlet side. I doubt you will find the female half of the connector that came on the Go
Power unit. The know on the side of the Council is what controls the water flow and therefor the load placed on the motor by the dyno. I have an old Go Power unit that I pieced together about 45 years ago, don't use it any more. I do have an original manual from Go Power if your interested for $20 plus postage I'll make a copy for you. It is tells you every thing you need to know to use the dyno,it is about 30 pages. If you have any questions let me know.
Jim