Red water and nasty residue inside circulator of my Radiant Heating System.

hot_rod

JackW said:

@hot_rod. Thanks; if I can't find anything used, I'll have to go with one of those; they're cheaper than the new brass. My two older brass pumps don't have flanges; in a way, that is a good thing. I just soldered the corresponding end to match the shut-off at the top and a union on the bottom side. Thanks for all your help.

yep, find a pump first, there is always a workable connection

SgtMaj

Bronze circulators and ditch the iron dielectric unions.

JackW

@SgtMaj, yep, that's what I'm in the process of doing. Thanks.