In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
when you are pumping away and prv goes into tee at extrol, the cold water is feeding up supply and hard to tell when you are air free with cold water feed. are you better off putting street pressureinto bottom boiler drain and forcing hotwater thru system. i have trouble purging with cold water going into header. ice had a post about getting initial air out of new boiler. any ideas or procedures would be great.will you have trouble purging out the air . i seem to have trouble with this arangement. put hose on and let run for long times and air just keeps coming with no end. thx