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Sorry, gave incorrect info here thinking of a different boiler, it was rather late, should have been in bed!! See above post from Brassedoff, the drain off is under the boiler between the fill loop pipes as you look up. Manual here: http://idealheating.com/downloads/manuals/204626_inst.pdf

Post deleted. Sorry, gave incorrect info here thinking of a different boiler, it was rather late, should have been in bed!! See next post from Brassedoff, the drain off is under the boiler between the fill loop pipes as you look up. Manual here...

You can drain the boiler and a certain amount from parts of the system above it by opening the pressure releif valve (PRV).

Please clarify the situation... So; is the leak from between the radiator and the tail? If it is between tail and valve try tweaking it up a bit more. What is all the ****e on the valve?! You don't need ptfe tape on a compression joint - not that this is anything to do with it leaking...

Modern cisterns generally have a 6L flush

There should be two wires from cylinder stat to programmer; HW on and HW off. It doesn't really matter which terminals. White wire normally goes to 5. Programmer CH to 4.

Wire it in between the heating 'on' terminal in the programmer and the white wire from the valve. Presumably, at present you have the white wire connected straight to heating on.

Was the bath moved at all during this work?

He's having you on!

Filter / housing?!

If it had been it would have been massive!!

The radiator shouldn't really have been put in the conservatory; at least it should have been installed so that it is possible to isolate it from the rest of the system and ideally be it's own controlled zone. Electric heating is normally preferred for this reason. In any case, assuming it's...

If you have no luck there, this may help: http://www.shop.lunns.net/

Is your system sealed or a traditional vented system ie does it have a small tank in the loft? Either way you would need to drain off some water. If you have the small tank in the loft, switch off the boiler, isolate the water supply to this tank, attach a hose and drain enough water off from...

Assuming you have a dual meter; power used anywhere in your home will be 'cheaper' during the off peak period. For that matter setting this timer to come on during the standard rate period will allow it to operate on standard rate electricity. If the water is not heating then you probably...

Depends on size and quality! I'm assuming full doubles at least 600x1000. You can get these under £100 of course.

It'll be a day's work, so probably anything from £120 for that; depends who it is! Rad prices are all over the net, or call a merchant! They'll be from about £125 each. You'll also need to include TRVs, inhibitor etc...

Pipe work size will affect flow, 'pressure' is limited to the head at the cold water storage.

If you're bothered about corrosion paint the pipe first. Silicone would only be corrosive until it has gone off. As said though - not a problem.

What sort of system is it? Gravity hot water? Fully pumped? 1x3 port valve? 2x2 port valves?