For tubing, SWIM uses plain old transparent vinyl tubing sold at the local hardware store. He uses 1/4 inch ID for one set of condensers and 1/2 inch ID for the other set. This is the kind he uses:
He connects the tubing with Quick Connects like the ones on this page:
His setup is like this.
Cut two 4 inch pieces of tubing. Attach each one to the condenser. He really pushes it hard onto the condenser. He's not ever planning to remove it. He then attaches two Quick Connect coupling pieces to those small pieces of tubing. He uses this type of coupling with a shutoff valve:
Then he attaches one really long piece of tubing to the lower Quick Connect. This tubing is connected to the water supply.
Then he attaches another really long piece of tubing to the upper Quick Connect. This tubing goes into the drain.
He then opens both valves and turns on the water before using the condenser.
Why does SWIM do it this way? Because he never wants to remove the tubing from the glass condenser every time he’s done using it. This is because every time you remove tubing and attach tubing to those glass hose barbs on the glass condenser you risk breaking the glass and you also stretch the tubing each time you remove it and re-attach it.
By using the valve type of Quick Connect, when SWIM is done using the condenser, he turns off the water supply, then shuts the valves on the tubing. He then puts the condenser in a sink and disconnects the Quick Connects from the condenser. He drains the condenser in the sink and then puts it away to dry. He then disconnects the long run of tubing from the water supply and drain and then connects the tubing ends to each other in a loop using the Quick Connect valves, and then simply rolls them up for storage. This keeps water from dripping out of the tubing and getting all over the place once you’re done.