In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
I'm replacing a boiler that had been condensating and decided to break in half while sitting idle. I want to use primary secondary pumping on the new boiler. It is one large zone with 3 inch headers. should I use flow control valves? Should I have both pumps come on at the same time or bring the secondary pump on after the boiler warms up?