As already stated by other members, certainly won't do any harm to try, only issue that I have ever found in use is that "home plugs" (ethernet through ring mains) don't usually work through mains filters and require a direct connection to the ring main, probably not a big issue and easy to arrange but just a consideration when using any form of mains filtering.
I further appreciate that home plug usage is frowned upon by many forum members as they can themselves be a source of interference to xDSL systems, experience seems to vary between different makes and installations.
It is more difficult but if at all possible I would suggest you should try to establish / eliminate the source of the interference, if you believe that it is being induced into the mains can you filter the heating system common mains supply ?
Definately more difficult as a filter would have to be added at the common supply point to filter all components, boiler, pump motorised valves, stat's etc., filter would have to be added at the consumer unit or heating common isolation point, small discreet mains filters are readily available for hard wiring, one example:
https://uk.rs-online.com/web/p/power-line-filters/2192808/Heating system boiler / room temp. stat's are quite common sources of electrical interference, does your noise event coincide with any temp. stat's. operation or more usually the period just prior to operation usually "heat demand satisified" (switching off) ?
I had a similar occurance in my daughters house with the oil fired CH boiler temp. stat., was easy to identify in this case as it also played havoc with the house TV's when switching off, stat. replacement cured the issue.
May not be similar to your circumstances as the mains borne noise generated was transient and clearly associated with a particular event.
Of course if the believe the interference to be RFI (air borne) and not ring mains borne then the mains filter you suggest won't do any good, will have to eliminate at source.