Farting PRV

[Tom]

Hi all, for a little while now there has been a noise coming from the plant room that lasts for a few seconds when the bath filler is opened. It sort of sounds like a grinding/vibrating/fart. I managed to track the source down, and I think it's coming from the PRV.

Is this a known issue with PRVs? Seems like you can replace the cartridge, or perhaps take it out and give it a clean.

I have a video of the thing making the noise but the file is too large to upload, even after resizing. Any ways around this?

Cheers