I recently replaced one of my radiators and took the opportunity to
fit a TRV. (There are none fitted to any of the other radiators).

Now the radiator (or just the valve?) makes a loud noise when the
system is running - not quite a hissing noise - more like a "rushing
of water" type noise.

If I turn the TRV up or down a notch, the noise stops for 5 minutes.
then starts again.

Any idea what could be wrong?

Thanks,
Mark.

On 18/12/2007 11:30 wrote:

Now the radiator (or just the valve?) makes a loud noise when the
system is running - not quite a hissing noise - more like a "rushing
of water" type noise.

Is the TRV bi-directional? If it is, you may well have installed it set
for the 'wrong' direction. If it's like ours, you simply remove the
sensor head, rotate a collar and then reinstall the head. No need to get
wet!

--
F

(Beware of spam trap - remove the negative)

On 18 Dec, 12:07, F wrote:
On 18/12/2007 11:30 wrote:

Now the radiator (or just the valve?) makes a loud noise when the
system is running - not quite a hissing noise - more like a "rushing
of water" type noise.

Is the TRV bi-directional? If it is, you may well have installed it set
for the 'wrong' direction. If it's like ours, you simply remove the
sensor head, rotate a collar and then reinstall the head. No need to get
wet!

--
F

(Beware of spam trap - remove the negative)

I'm not sure - how do I tell if it's bi-directional?
It doesn't stop the radiator from getting hot at all - everything
seems to work just fine.

Thanks,
Mark.

On 18/12/2007 14:30 wrote:

I'm not sure - how do I tell if it's bi-directional?

What did it say on the box?

If you've not got the box then perhaps someone will be ale to tell you
if you post details of the make and model on here or do a search on the
manufacturer's website.

--
F

(Beware of spam trap - remove the negative)

F wrote:
On 18/12/2007 14:30 wrote:

I'm not sure - how do I tell if it's bi-directional?

What did it say on the box?

If you've not got the box then perhaps someone will be ale to tell you
if you post details of the make and model on here or do a search on the
manufacturer's website.


Alternatively does it have an arrow marked on the body in the direction
of flow?

Andrew

It should have an arrow on the body indicating the recommended direction of
flow.
Modern good quality TRVs such as Danfoss, Pegler, Honeywell etc are
bi-directional and quiet.
If yours is a cheaper make then it may not be bi-directional or quiet.

Davy

wrote in message
...
I recently replaced one of my radiators and took the opportunity to
fit a TRV. (There are none fitted to any of the other radiators).

Now the radiator (or just the valve?) makes a loud noise when the
system is running - not quite a hissing noise - more like a "rushing
of water" type noise.

If I turn the TRV up or down a notch, the noise stops for 5 minutes.
then starts again.

Any idea what could be wrong?

Thanks,
Mark.

You need a Auto By Pass Valve in your system.

url:http://myreader.co.uk/msg/1391117732.aspx