"Christian McArdle" writes:

If you are rejigging the system so much, you really should convert to
pressurised operation rather than faff around with vent pipes, tanks, feeds,
pumping over and airlocks. You will need to check the boiler is suitable,
but the presence of the manually reset cutout is a good sign. It will be far
easier to convert to pressurised operation than to debug a poor vented
design. To convert, a competent DIYer should manage it in a hour or two, if


Is it allowed for a DIY job? I thought this was forbidden, or is that
only for a pressurised secondary circuit?

Keith Refson

I'm not familiar with the design of pressurised primary circuits. Is
there some information you could point me at?

Keith Refson
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Keith Refson 01865 435302 (Home)
23 Napier Road 07773 074233 (Mobile)
Oxford OX4 3HZ K.Refson AT Ntlworld.com