hot water circulation

[Mec]

Hi,

What's the pipe size for a hot water recirculation system? And how to select a pump for that? What's the flow we have to consider?

Thanx!

[havasu]

Most others as well as mine is 1/2" copper, but I would assume that all depends on the fittings and requirements for the specific pump you choose. Grundfos is one brand which is mentioned here alot, but I'm sure there are others with similar qualities.