- 15 Feb 2021
- Reaction score
Folks, system is an Ideal Icos heat only boiler topping up a thermal store upstairs so pretty simple flow and return to boiler. All is working fine other than an occasional bang close to the boiler that is strong enough to shudder back to the 210lt tank and make it shake also. Boiler doesn't sound as if its kettling or anything and there is an air admittance valve on the return which is working fine. This bang maybe happens about half a dozen times a day. Also pretty sure its not pipe expansion or anything like that. Any thoughts would be appreciated....