I had British Gas in (under contract) to fix my heating system today,
and while the engineer was here he gave me a quote for supply & fit of
11 TRVs and re-fill the system with Fernox F00079, which came in at
£355.

The question is, is this a reasonable quote, or should I attempt it
myself? My only worry is that it is a sealed system (not combi boiler
though) and I wouldn't have a clue about where to add the inhibitor!  I
also know what my wife would say if I turned up with 11 valves in a bag
and told her what I planned.

"Alan"  wrote in message 
news:1126968460.591896.152610@z14g2000cwz.googlegroups.com...
I had British Gas in (under contract) to fix my heating system today,
and while the engineer was here he gave me a quote for supply & fit of
11 TRVs and re-fill the system with Fernox F00079, which came in at
355.

The question is, is this a reasonable quote, or should I attempt it
myself? My only worry is that it is a sealed system (not combi boiler
though) and I wouldn't have a clue about where to add the inhibitor!  I
also know what my wife would say if I turned up with 11 valves in a bag
and told her what I planned.


IMHO this is on the steep side. To DIY would cost you around 120. Its not 
more than a days work by any stretch of the imagination. The 120 figure 
also includes very high quality TRV`s and not junk which BG may or may not 
be fitting. Sealed systems are also far easier to fill and empty than your 
typical open vented. Just find the drain cock and open it. Then open all 
your bleed screws (upstairs first). Change all the valves and tails. To add 
the fernox, simply close the lockshield valve and TRV on  a small radiator 
and disconect it from the pipes, then open one of the valves with radiator 
upside down and pour the fernox in. Then close both valves and put it back 
on wall. Reconnect to pipes and away you go. Close all bleed valves, refill 
and bleed system and finally check the pressure is correct.

Job done. :-)

Regards

John

On Sat, 17 Sep 2005 16:15:32 +0000, googlebot wrote:


> 
> "Alan"  wrote in message 
> news:1126968460.591896.152610@z14g2000cwz.googlegroups.com...
> I had British Gas in (under contract) to fix my heating system today,
> and while the engineer was here he gave me a quote for supply & fit of
> 11 TRVs and re-fill the system with Fernox F00079, which came in at
> 355.
> 
> The question is, is this a reasonable quote, or should I attempt it
> myself? My only worry is that it is a sealed system (not combi boiler
> though) and I wouldn't have a clue about where to add the inhibitor!  I
> also know what my wife would say if I turned up with 11 valves in a bag
> and told her what I planned.
> 
> 
> IMHO this is on the steep side. To DIY would cost you around 120. Its not 
> more than a days work by any stretch of the imagination. The 120 figure 
> also includes very high quality TRV`s and not junk which BG may or may not 
> be fitting. Sealed systems are also far easier to fill and empty than your 
> typical open vented. Just find the drain cock and open it. Then open all 
> your bleed screws (upstairs first). Change all the valves and tails. To add 
> the fernox, simply close the lockshield valve and TRV on  a small radiator 
> and disconect it from the pipes, then open one of the valves with radiator 
> upside down and pour the fernox in. Then close both valves and put it back 
> on wall. Reconnect to pipes and away you go. Close all bleed valves, refill 
> and bleed system and finally check the pressure is correct.
> 
>

Some more info in the SealedCH FAQ. 

-- 
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk 
Gas fitting FAQ  http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html