We bought these from McMaster Carr. They are quick disconnects for the silicone tubing and some stainless collars to attach the tubing. McMaster is super quick with shipping. We are very pleased. We are going to treat these so they don’t leach lead. We planned on using polysulfone fittings at first, then switched our thinking to stainless, then to brass. The plastic have an obstruction in them that can clog while the stainless are expensive and out of stock (at morebeer.com). Brass seems like a good, cheap alternative.
Part Numbers:
http://www.mcmaster.com/#6739k59