Is there a retro-fit siphon for condensate pipes?

[Hufty]

Vaillant do/did one for ecomax boilers (Part number 2370104) which I imagine is still available although I couldn't find a picture. Or try googling "Vaillant 180985" which is the siphonic trap out of an ecoTEC plus. You could easily bodge that under any boiler.

 

[Hufty]

Just to burst this bubble, it doesnt seem to matter how the trap discharges, it still freezes.

You do have a better chance of the condensate not freezing if it's sluiced down in batches rather than comes as a continual drip. That's why boiler manufacturers put autosiphons in.

 

[ajrobb]

If you had a big enough condensate reservoir filled with lime chippings, say, could you then discharge into iron drains or septic tanks?

I suspect you'd need to vent it outside too.

 

[Adrian80]

Very late in the day,

http://www.worcester-bosch.co.uk/in...prevent-frozen-condensate-with-our-new-device

 

[Dean744PiN5]

Those were the days, 'twas a good little earner a few years ago sorting out frozen condense pipes and upgrading them not so common now it seems.