Just an update on the boiler situation...
The rubber seals on the new pump are thick O rings and not the flange oval ones that are on it. So, I (designated gopher) went to the plumbing store to buy them and they didn't know what I was talking about. (sigh) Said, 'you'll have to replace the mounting flanges to use the new seals. Not an easy task 'cause they've been on for 30 plus years and getting on the concrete floor to do it is not comfortable anymore.
So, I bought sheet rubber, came home, cut them out, screwed the new pump in place and purged the system of air.(well, actually hubby did most of that. LOL) Hubby checked an hour later and it's leaking. Bad, bad enough to take everything apart again. Recut new oval seals, carefully installed, purged and started it all.... now one of the zones isn't working. Akkkkkkkk
Okay, I'm better now.