In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Just read Pumping away and as a hydronic novice learned a good deal and thoroughly enjoyed it.
As I have posted on another thread here I have a new installation wrought with issues.
The plumber that installed the WAY oversized boiler also plumbed the the zone pumps in the return line. In Dans book he describes why this is bad practice. He also makes it very clear that in a system plumbed P/S you must always pump away from the supply tee and toward the zones. This is not the way he plumbed it. I have included some pictures. Will this effect the operation of the P/S interface? Do I need him to come back over and correct it?
I have included some pictures that twill hopefully help.