I was wondering about boiler chemicals and how many contractors (if any) were using them on brand-new systems. Do we need them? Hydronic systems are closed to the atmosphere, so what are we treating? I also wondered about the water we’re using. Is that any different these days?
So I asked some contractor friends. One said, “I think all new systems need, at the very least, to be power-flushed. Using a cleaner would be even better because it would help cut the oils, greases and fluxes, but how much of that stuff is in there really depends on how careful the pipefitters are.”