central heating noise

[Marco1976]

Hi,

I was wondering if it would be ok for me to set the pump speed at two rather than the current 3.
I have nine radiators over two floors. the system is sealed with a worcester bosch 28si system.
The water flow in the pipes is noisy especially as it comes on in the morning. i have bled all the radiators but there was no air issue.

thanks

 

[twgas]

Try it, technically the pump speed should be calculated to suit the system. But if it works on 2 and you get no noise happy days.