Water Hammer - Boiler Call for Heat off - Press Diff Bypass Valve or boiler setting???

[Philtrap]

Direct swap. Most circulators are. They standardized flanges 40 years ago or so. Bumblebee is a good choice

Tom - I installed the Bumblebee. Should I modify the Delta T on the pump? It's factory set at 20.

 

[Tom Sawyer]

I'd leave it at 20 degrees for awhile and see how it performs. Any adjustments should be slight and give them 24 hours to settle in

 

[Sponsor]

 

[Philtrap]

Thanks!!

 

[Philtrap]

I'd leave it at 20 degrees for awhile and see how it performs. Any adjustments should be slight and give them 24 hours to settle in

Hi Tom - I still get a banging when the zone valve closes. I don't recall this happening last year. I only noticed it this year. It only happens on the down stairs zone. Is there anything you can think of that I can do? Bleeding the zone, adding something to the zone.. Any help would be appreciated.