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If there is seperate flow and return pipes for up and down then it would be quite simple, you would need to fit two zone valves only on the flow pipes and possibly a bypass valve, these could then be controlled by a programmer/timer and have a room stat for up and one for down. The roomstat...

Nope dont worry about that, the pipe goes in the trap about an inch so you'll need that much movement to pull it out.

You'll need movement in the pipe to be able to get that out, be warned if it is backed up and you pull the pipe out of that trap water will go everywhere.

Sounds like waters dripped onto something it shouldnt.

You could try tightening the 2 allen key bolts on the pump head otherwise its new pump time. The pumps do get really hot in use anyway. Cylinder in the loft?? I think you'll find it will be a cold water storage tank or a feed and expansion tank, if its overflowing you need to get it looked at..

Different boiler manufacturers sometimes have different measurements, but usually yes 300mm from the flue to your boundary.

300mm from the boundary. IIRC

The warrenty depends on if your installer is registered with the manufacturer, as for controls at the very least it will need a clock and a room stat, these can vary from £30 - £300 depending on what your having.

Duo tec doesnt come in 30kw.

The pressure for the radiators is not connected to the mains water pressure, if you top it up and it then drops then you either have a leak somewhere or the expanssion vessel (red one) is knackered or the prv on the heating is letting by.

I've never seen a cooker with enough of a recess to take a waste pipe...

Baxi.

Whats showing on the gauge after you filled it up??

He deliberately overheated the boiler!!! :shock:

Just a heads up, plumbfix are doing bundles of 22mm for £110 inc.

That would be 1" and 1/2" pipework, an 837 consumes about 3.5m3 from memory, your existing pipework wont be big enough.

Wrong water balance usually results in the liner becoming bleached, not heard of one flaking like you describe???

Yeah I dont think you can get a 3/4 wp elbow, will have to be a bent 3/4 female iron, well supported on some 3 x 2 or something like that..

You may have to put some extra studs or noggins in and hold it on the pipework.. I wouldn't use flexis they often reduce the internal diameter of the pipe quite a lot which isn't good for shower performance...

You've got to recess it INSIDE the wall...