Hi All,

I am getting my CH system replaced soon. The boiler is old (15
years+) and the rads even older. Due to the presense of a Primatic
cylinder no inhibiter is used. At least one of the rads is very
sludged up (cold at bottom). My question is: How likely will the
pipework need replacing? It's approx 15mm (not microbore).
The water is not very hard.

TIA. W

In an earlier contribution to this discussion,
W wrote:

Hi All,

I am getting my CH system replaced soon. The boiler is old (15
years+) and the rads even older. Due to the presense of a Primatic
cylinder no inhibiter is used. At least one of the rads is very
sludged up (cold at bottom). My question is: How likely will the
pipework need replacing? It's approx 15mm (not microbore).
The water is not very hard.

TIA. W

If the pipework is copper, it will probably be ok. I assume you're getting
rid of the primatic cylinder?

The chances are that your new system will be unvented (pressurised). Don't
be surprised if your radiators spring lots of little leaks - there is likely
to be lots of internal corrosion. You should plan on replacing them all.
--
Cheers,
Set Square
______
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On Mon, 15 Nov 2004 13:47:27 -0000, "Set Square"
wrote:

In an earlier contribution to this discussion,
W wrote:

Hi All,

I am getting my CH system replaced soon. The boiler is old (15
years+) and the rads even older. Due to the presense of a Primatic
cylinder no inhibiter is used. At least one of the rads is very
sludged up (cold at bottom). My question is: How likely will the
pipework need replacing? It's approx 15mm (not microbore).
The water is not very hard.

TIA. W

If the pipework is copper, it will probably be ok. I assume you're getting
rid of the primatic cylinder?

Yes, definitely :-)

The chances are that your new system will be unvented (pressurised). Don't
be surprised if your radiators spring lots of little leaks - there is likely
to be lots of internal corrosion. You should plan on replacing them all.

At present I want to get a Heat bank (subject to mains pressure/flow
rate) and I am intending to replace the rads anyway.

Cheers, W.