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Adding inhibitor to CH system without draining

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Andy Hall

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Adding inhibitor to CH system without draining

On 3 Nov 2003 23:41:36 -0800, (Marc Lee) wrote:

"Jonathan Curtis" wrote in message news:2f070d15bc780ca11842e86db5ac4b4d.113530@myga te.mailgate.org...
Yes, but you don't say what system you have. If C/H cistern in loft just
put
some in there. If sealed or combi turn both valves off at any radiator.
Have a few cartons ready then *hold valve with mole grip* and loosen the
nut next to the radiator to drain off a litre or so. Now use a large
radiator
key to open up the radiator at the opposite end to where it's small air
release point is. Use a funnel and rubber tube or anything you can get
your hands on to put the inhibitor in.
Open up valves, repressurise and vent rad when done.

Jon

The system has a cistern in the loft, so I can just add the inhibitor
through there and it will get drawn through when I put the last
radiator back on.

My main concern is that there wont be a reaction between any existing
inhibitor and the new inhibitor that I add to the system.

Does anyone have any views on Fernox / Sentinel? It's a fairly old
system, not sealed with a cast iron boiler.

Thanks
Marc

I doubt whether there would be any reaction between different brands
of chemical, but personally I would flush the lot and start again,
simply to have a known situation.

..andy

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