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Unfortunately, I know very little about our old boiler or pump, as I never really thought about it. I just know it was a Glow-worm. Don't know anything about our old pump.What make/output were/are the old/new boilers.
make/model of old/new circ pumps
Check that pump is pumping in the correct direction. (Towards either a mid position valve or towards two port valves)
Our new pump is the grundfos ups3. It first got installed at an angle, then when we first complained of a heating noise issue, plumbers said that was wrong and put it on its side.
Regarding the pumping in the right direction, I don't have much knowledge about this, so I will share a picture to show the set up here - if it helps. One from as close to the side as i can get, and one from above.
I rarely notice much noise coming from here though.
Our new boiler is the ideal LOGIC HEAT R18. I didn't realize that small sticker got put on it with the date that the F1 protector got added. This was on the 19th of October last year. I think I remembered wrong. So we will have just had this summer with no heating, which seemed to have settled all this generation of whatever gas it was, but the clicks and bangs are still just as bad.
Let me know any other information I can provide.
Thanks.