I'm wondering if anyone could help me diagnose what this noise could be. I'm sure it's coming from next door. I've been round and he can hear it too. It's proving difficult to isolate where the noise is coming from.
It happens like clockwork, every morning at pretty much the same time, and every 4 seconds. It goes on for a while. During this time I don't have my boiler on and I'm not using any water, and haven't done all night.
Also, I had a brand new boiler put in about 6 months ago. Next doors boiler is a Potterton Powermax HE and is 16 years old. I know this as it's the same one I got replaced.
I've attached a video with the noise
Thanks in advance.