Are these TRVs any good?
 

http://www.screwfix.com/app/sfd/cat/...30518&ts=77832

http://www.screwfix.com/app/sfd/cat/...30518&ts=77832

Personaly, I think TRVs are one of the few plumbing items I think it is
worth buying a brand name for.

Christian.

"Mr Fizzion" wrote in message
...
http://www.screwfix.com/app/sfd/cat/...30518&ts=77832


No. Buy Danfoss at http://www.bes.org.uk Cheap enough there.

On Wed, 27 Jul 2005 17:18:23 +0100, Doctor Drivel wrote:

"Mr Fizzion" wrote in message
...
http://www.screwfix.com/app/sfd/cat/...30518&ts=77832


No. Buy Danfoss at http://www.bes.org.uk Cheap enough there.

I cannot get that page to render correctly in either Ffox or IE
--
Jim
Tyneside UK

Jim Scott wrote:
No. Buy Danfoss at http://www.bes.org.uk Cheap enough there.


I cannot get that page to render correctly in either Ffox or IE

It uses an evil Java applet with a broken font...

alex
--
Alex Meaden
Technical Support Officer
Computing Service
University of Kent

No. Buy Danfoss at http://www.bes.org.uk Cheap enough there.

I cannot get that page to render correctly in either Ffox or IE

He meant http://www.bes.ltd.uk.

Christian.

"Mr Fizzion" wrote in message
...
http://www.screwfix.com/app/sfd/cat/...30518&ts=77832



no,ivehadseveralfail.buyabrandname.

steve

I'd be cautious about buying any 'Reversible' TRV's from Screwfix.
I bought 10 from them (they don't appear to sell the type I bought any more,
& I can't remember the manufacturer)
I ended up having to reverse more than half of them - what a pain in the
a**e !!!.

CG...



"Mr Fizzion" wrote in message
...
http://www.screwfix.com/app/sfd/cat/...30518&ts=77832

On Wed, 27 Jul 2005 17:01:57 +0100, Mr Fizzion
wrote:

http://www.screwfix.com/app/sfd/cat/...30518&ts=77832


Cheap TRVs are a false economy. Better choices are Invensys TRV4,
Pegler Terrier or Danfoss.



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..andy

To email, substitute .nospam with .gl

In an earlier contribution to this discussion,
Alex wrote:

Jim Scott wrote:
No. Buy Danfoss at http://www.bes.org.uk Cheap enough there.


I cannot get that page to render correctly in either Ffox or IE

It uses an evil Java applet with a broken font...

alex


Try www.bes.ltd.uk

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In article ,
Christian McArdle wrote:
Personaly, I think TRVs are one of the few plumbing items I think it is
worth buying a brand name for.

Yup. I think you gets what you pay for. I've had Wicks and Homebase own
brands fail after about 5 years, but the current Drayton ones have passed
that deadline and still working fine.

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Dave Plowman London SW
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Jim Scott wrote:

No. Buy Danfoss at http://www.bes.org.uk Cheap enough there.


I cannot get that page to render correctly in either Ffox or IE

That's because the plonker always posts the wrong url ;-)

http://www.bes.co.uk works.

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Cheers,

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My view too. You don't want the hassle of draining down the system
again because cheapo TRV has failed.
I've foundt he Pegler ones SF sell ( Item 23130) are good.

O.B. wrote:
My view too. You don't want the hassle of draining down the system
again because cheapo TRV has failed.

Hi Guys, interesting thread, I didn't know that there was such a
variation in quality on TRVs and have always just used cheap 5 quid
jobs. Just wondering what you all mean when you say they fail - I
understood that they all have a limited lifespan something do to with
the wax capsule or something, and therefore the heads will need to be
replaced after a number of years.
Is this what you're referring to? I don't get it as surely the heads
just unscrew and can be replaced without draining down? Or do the valves
fail too?

Cheers,
Ben.

Is this what you're referring to? I don't get it as surely the heads
just unscrew and can be replaced without draining down? Or do the valves
fail too?

Both parts fail, although the head usually goes first. With a branded valve,
you're more likely to find a compatible replacement head in 10 years time,
than you are in 5 years time for some unbranded make.

Christian.

On Thu, 28 Jul 2005 11:16:35 +0100, Ben Willcox
wrote:

O.B. wrote:
My view too. You don't want the hassle of draining down the system
again because cheapo TRV has failed.

Hi Guys, interesting thread, I didn't know that there was such a
variation in quality on TRVs and have always just used cheap 5 quid
jobs. Just wondering what you all mean when you say they fail - I
understood that they all have a limited lifespan something do to with
the wax capsule or something, and therefore the heads will need to be
replaced after a number of years.
Is this what you're referring to? I don't get it as surely the heads
just unscrew and can be replaced without draining down? Or do the valves
fail too?

Cheers,
Ben.


Various failure mechanisms. Typical ones:

- valve body mechanism jams because of poor manufacturing tolerance
coupled with crud in the system.

- seal on valve begins to leak

- wax capsule fails and the valve locks on, off or simply has no
thermostatic action.


If you take a product like the Invensys TRV4, it has been available
for at least 25 years and the capsules last a good 7-10 years at
least. I have some that are 15 years old. You can buy the
replacement heads and swap them out. often it's cheaper to buy the
complete valve and not bother replacing the base.

On the cheap ones, failure usually means changing the whole valve,
base and all because often they have a proprietary fitting.





--

..andy

To email, substitute .nospam with .gl

Andy Hall wrote:

Cheap TRVs are a false economy. Better choices are Invensys TRV4,
Pegler Terrier or Danfoss.

Most of the cheapies I have found tend to give a high pitched squeeling
on the last bit of the close. in-audible to the slightly older
generation, but a PITA as it can last several minutes.

The ones on our very old and being replaced radiators are "Myson" look
as old as the rads themselves, but definately in excess of 10 years, and
worked exceptionally when the old system was in operation.


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