Water rushes to radiators when toilet is refilling

[Morris40]

please do as if the heating was connected to the hot or cold there's no way the pressure would be stable, most strange

 

[stardanny]

maybe the pipe to toilet is touching radiator pipe, passing noise to rad pipe where you can hear or feel?

 

[matt1e]

maybe the pipe to toilet is touching radiator pipe, passing noise to rad pipe where you can hear or feel?

Yup my thoughts too

 

[DP]

Dead leg is what comes to mind

 

[sundaybighouse]

This "dead leg" concept is interesting. How would I find that out, I assume I just follow the pipes to see where they lead. The problem is I don't know what it is supposed to look like.


The fill pipe for the toilet does touch another pipes but I can actually hear the rushing of water through the pipe to the radiator.

 

[sundaybighouse]

The resolution was:

When they did the install, they moved the fill pipe for the toilet and left it touching against the return for the radiator(this explains why it didn't happen with my old system). So the noise from the toilet refilling was travelling directly to my radiator.

Most strange as it did really sound like my radiator was filling up with water.

Anyway, thanks for all the advice and well done to those who got it right!

 

[HERTS P&D]

Was the washer on the toilet float valve changed to a high pressure one???

Andy