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I want to apply constant circulation to my system. I have a T50 Munchkin with ci rads. The p1 and p2 pumps are controlled through the controller for priority for the indirect. What I want to ask is, what is the best method for controlling the zone pumps when the indirect calls for heat. Being the piping is pri/sec, when p2 calls for heat and p1 shuts off, will the zone cics just loop around through the closely spaced tees and not interfere with p2 operation. Thanks for any info.