|Lobster wrote: |> . wrote: |>> Janner wrote: |>>> We've recently moved house. Whenever the CH is on, there is a constant |>>> clicking/popping noise coming from the pipes (akin to the 'expansion' |>>> sounds you sometimes get when a system first fires up). This carries |>>> on all the time the heating is on, with clicks/pops every couple of |>>> seconds. These noises seem to come only from the upstairs pipes. |>>>
|>>> The system is gas fired, with the combi boiler being about 6 years |>>> old. The radiators (and presumably pipework) are probably about 30 |>>> years old. The only exception is one small radiator that is probably 6 |>>> years old. The previous owners had the boiler serviced annually. |>>>
|>>> So, does anybody have an idea what might be cuasing the noise? And, |>>> more importnatly, how can we fix it? |>
|>> expansion in the pipes and an insufficient gap where the joists have been |>> notched out would be my guess. I did it on one install in the last house. |>> had to take the boards up again and re-do the offending notch by the |>> bathroom and the really offensive one in the bedroom. |>
|> That would be the obvious cause of noise while the system is warming up, |> but why would it persist continuously while the system is at |> temperature, as the OP indicates? |>
|> David | |I figured that as the boiler cycled the water in the pipes heated up causing |expansion and then the boiler reached temperature and then the contraction |happened. I'm not talking about inches of expansion, maybe a few mm
A few *tenths* of a millimetre would cause clicking. I would locate the source of the noise and apply a thick grease, or maybe candle wax if it melts on the pipes when hot, to the top of the pipe, then let it run down to the point which is moving. Not too much as you do not want it to reach the downstairs ceiling.