New Rad Knocking

[nickwrxstiv2]

Hi,

I've managed to fit a new 1800x600mm rad in my bedroom. Works a treat apart from when the heating comes on in the morning it makes a loud knocking noise. It's loud enough to wake me up earlier than my alarm which is a bit of a pain.

It has a TRV on the inlet that is set to 2/3. The bleed valve is on the same side of the rad as the TRV.

The other rads in the house also make a knocking noise but no where near as bad as the new rad in my bedroom.

Anybody know what causes this?

Thanks,

Nick.

 

[Dan Robinson]

Loose pipes?

Cheap and nasty valves?

Valves on the wrong way?

 

[HERTS P&D]

Radiator onto bracket with no plastic insert to stop noise?

Andy

 

[nickwrxstiv2]

Radiator onto bracket with no plastic insert to stop noise?

Andy

Hi Andy,

You may be onto something there! I didn't put any of the clips onto the brackets! Makes sense if the rad is expanding and contracting!

Thanks!

Nick.

 

[mysteryman]

If it rhythmic knocking, it is probably the TRV with the flow in the wrong direction. Some can be altered to suit.

 

[mivy2006]

id guess pipes not clipped

 

[nickwrxstiv2]

I've got my heating engineer coming tomorrow so I'll get him to have a look at the TRV for me.

What do you mean by pipes clipped? Clipped to the joists under the floorboards?

Thanks for the replies,

Nick.

 

[mivy2006]

Yeah you need to clip then reg under floor or u get the hammer, it what causes it most in my experience

 

[nickwrxstiv2]

I had some floorboards up before we finished the room and I'm sure they aren't clipped to anything. It's 8mm microbore if that make sa difference to the solution?

I'm gutted as I've sanded and varnished the floor, I'm not going to be able to take them up not.

It does sound as though it's coming from the TRV end of the rad rather than the outlet end.

Nick.

 

[mivy2006]

Eek. Lets hope it tbe trv then

 

[mysteryman]

Turn it up or down when it's knocking. If it stops, that's the problem.

 

[nickwrxstiv2]

Turn it up or down when it's knocking. If it stops, that's the problem.

Excellent idea, I'll try that tomorrow morning and report back!

Thanks guys,

Nick.