who sells solar water heaters?

[tada]

I did make my own thermosiphon system 20 years ago with a $200 discounted water heating panel and an old water tank that I painted matte black. It worked ok then started leaking from the joints. Maybe I didn't preheat the copper pipes enough before soldering.[!]

Also Drainpipe said they can install a thermosiphon unit. My guess is they just order it from the kaloko vendors. Those too heavy for my roof so I rather have the Blazing tube units.