I seem to remember that the circulating pump should be on the return side of a radiant floor system loop, as it is cooler, and theoretically should make the pump last longer. How would you write it up, if at all?
I wouldn’t write it up without a better reason.
The temp differential is only around 20 degrees.
http://www.weil-mclain.com/en/multimedia-library/pdf/weil-mclain-pdf/service-bulletins/SB0206.pdf
Mike,
Your links subject was more important than my original concern. Somewhat humbling.
Thank you.