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On the front of the boiler if you pull the bottom forward and down, you will see a little red flat switch to the right of the boiler t/stat it will either be next to pumped or gravity, another way to tell is there are 4 pipes coming off boiler, or do you have a Y shaped valve on the system...

Fitting an ideal is dangerous to your health, got to be the most ironic name on the market, as they are anything but

What sort of system is it Y Plan, S plan or Gravity HW pumped CH, do you know?

Depends how strong you are!

Pressure equalising valve is usually fitted on the hot and cold pipework to a mixer, it equals out the hot and cold pressure so that the cold main doesnt overpower the hot, which is a common fault when using a combi with a mixer shower

If you keep getting air in the system usually a design issue or could be iron oxide (sludge) build up when you get iron oxide, it can cause hydrogen build up, when you bleed rad see if you can light the gas coming out if it ignites its hydrogen, i take it its an open system you have, the answer...

What you say is actually no longer true, the well known gas supplier has dropped its prices dramatically to be competative with the RGI's on installation, due to the fact 9 out of 10 customers on a massive nationwide survey would choose well known gas company over any1 else if the prices were...

No specific central heating/ boiler training then?

Nice 1 pal been on the building regs sight but its a bit vauge, its not a problem just wondering anyway, cheers

I couldnt find uk, britain or england in the list might just be me, so does any1 actually know then ?

Outside where possible, the only reason i ask is i have read a previous thread and some people have said its not allowed as the sole vent, how exactly do they work do you know?

I HAVE 1 BATHROOM IN MY HOUSE WITH 1 TOILET IN IT THE SOIL STACK RUNS INTERNALLY AND GOES UP INTO THE LOFT, WHERE IT TERMINATES USING AN AAV MY BATH DRAIN AND MY BASIN DRAIN BOTH TERMINATE INTO THE STACK ALSO, IS THIS ALLOWED ACCORDING TO BUILDING REGS OR NOT?