Hi All,Mums old ex gravity (now fully pumped) indirect CH system has beendrained and re-filled (hopefully) for the last time for a while and Iam concerned about making sure it doesn't freeze up if she's away or afew days etc?The rads are smallish and cast iron and the boiler a low capacitycopper HE.There is no frost setting on the boiler nor room stats etc. It's avery basic system but it works for Mum and she's happy with it fornow. ;-)So, I'm not sure if I should run some de-scaler though it (wede-scaled the HE on it's own a while back) first or because of thediameter of all the pipes (1-1/2" down to 22mm) that it's not worthit?So, alongside that, is there any good VFM 'stuff' to cover both thecleaning and the inhibiting / antifreeze anyone would recommendplease?Cheers, T i mp.s. For pipes from the water tank in the loft ... would plastic bebetter than copper re frost resistance?

You can buy stuff from "Fernox" does the job.In days of yore it was unnecessary, it only became necessary whenbalanced draught/room sealed boiler came into use. ie the heatexchanger is exposed to frost.Pipework should be insulated, this guards against frost as well asheat loss.

VFM CH antifreeze / inhibitor?

Nov 14, 2012 22 Replies

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harry 13 years ago

None of the joints "push open". The pipe splits.

PVC pipe goes brittle and splits in frosty conditions. ABS pie doesn't get damaged when frozen.

Dunno about the flexible stuff.

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T i m 13 years ago

Apart from the compression fitting tap I found on the floor one time, pushed off by the ice that was still sticking out of the 15mm stand pipe? ;-(

Ok.

Not seen that type mentioned. What is the std 'Speedfit' or 'Hep2O' stuff made of?

"Speedfit ?PEM? fittings and PEX and Polybutylene Barrier Pipe .."

Not sure that helps me though.

Ok, no, matter. I was just wondering ...

Cheers, T i m

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harry 13 years ago

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