65 gallon reef ready owners

Last week I got a phone call from a tank owner that wants me to start getting his 2 65 gallon reef ready tanks into shape. Today I spent 6 hours cleaning out and simplifying both sumps. When the owner put the 2 tanks in the used clear tubing with metal hose clamps that are rusted. Part 2 of getting thus tank into shape will be hard piping the tanks. Does anyone else have 65 gallon rimless reef ready what are the stock bulkhead sizes. Looking at them I say one is 1 inch the other is 3/4. Im pretty sure thats what they are but just want to make sure before I go with the wrong stuff. They are both different sizes for some reason