In article PO6dnYxHLP04JevanZ2dnUVZ_hCdnZ2d@championbroadban d.com, "Zyp" wrote:

One of the problems with hot water boilers, is you MUST get ALL of the AIR
out. At the higher points in the piping, there should be a Hoffman Air
Vent. As the system is filled, air must be purged. Also, pumps are meant
to pump water, and if there's any air in the impeller, it won't pump well.
You must be sure all the air is out before starting.

No, not really. You need to get *most* of the air out, sure. But *all* of it?
Every last bit? Before starting? Naaaah.

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Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.