[Steve Davis]

I have done a couple of 16s. I used O-rings from Lowe's. I don't remember the number for the larger one, seems like no. 17 or something. The smaller one was harder to find, but I found it at Lowe's also. Look where the copper fittings are. They have the tees that do not require solder, the tubing just pushes in and locks. They have a replacement O-ring for them. The brand is Grip N Go, you need the 1/2" size. The part no is 519-12. For the very large rubber on the drum, I used an oil filter gasket.
Steve