On Thu, 05 Jan 2006 21:46:21 +0000, raden wrote:

In message .uk, Ed
Sirett writes
On Wed, 04 Jan 2006 23:38:57 -0800, Mike wrote:

Hello,

I am looking for a little bit of advice on my central heating system.

... ...


What do people think? Should I really think about replacing the system
if it's working? As I have said I have not moved in yet so not
spending a lot of time there so the system is on low. I suppose until I
move in I wont see how good the CH and HW supply is although I suspect
as a single bloke living there alone its going to be adequate.

Thanks very much for everyone's time, patience and any advice.
(Thanks also to Ed Sirett for pointing me to here and his response)

I think things may not be anywhere near as bad a BG are suggesting.
What is the current boiler power?
Around 10kW or 35 kBtu/hr should be fine.

Ed, would you say that the person who said "the plastic pipe will allow
lots of oxygen in the system to corrode the radiators " is telling pinky
porkies or blatant lies ?

OP - just step away from British Gas ... quickly

AIUI Oxygen _can_ diffuse through a warm plastic pipe non barrier pipe.

What I'm unsure about is the relative diffusion rate through the plastic
pipe as against, say, the open surface in the F&E tank.

Intuition can sometimes be misleading but my gut feel is that sod all
oxygen of any significance can get through the plastic pipe. Even if I'm
wrong the corrosion inhibitor should be able to handle it, it would just
need replacing more often.

It must be magnitudes less trouble than pumping over or drawing in air,
and systems do survive for long periods of time with those serious faults.


--
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
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html