Tom

Why so?

Yep! I'll raise a glass to you this evening Steamy

Ah gotcha, we're on a FIT which is about 15 years old I think, so quite good rates and with another 10 years to run IIRC. So for the moment there is no point returning any to the grid if we can use it - economics change when this finishes I guess, as above.

Thanks @Conor, but I'm not sure I follow. I thought the diverted allows you to use your excess PV generation but you also get your FIT for the generation - whether younise it or it enters the grid?

Ah cool, I was looking at the Eddi diverter - guess it will do the same

Hi all - we are having our ASHP and UVC installed in a few weeks and would like to make sure we will be making the most of our PV. We have approx 12kW on the roof and will be diverting what we can to the immersion - what's the most efficient/best way to set up the UVC so we are making best use of this energy throughout the year? The installers have told me the UVC will be a Telford Tempest (300l) and will have two immersion elements - the lowest being for the legionella cycle. Can this element also be used for diverted PV power? I'm guessing the diverter would dump the power to the upper most element first, and then switch to the lower element when the top is up to temp. Is that right? Are diverters that sophisticated? Thanks all

Might it be simpler/easier/cheaper to make an insulated "tent" inside this to use as habitable space? Other than that I'm afraid I'm fresh out of ideas. Would your architect not have a plan in this respect?

Reasonable to ask I guess Steve, but then why start the thread with:

In other news, I asked the plumber to put some inhibitor in when he filled the system again, as it seems he didn't bother first time around. Currently just hooked up to an electric boiler but soon will be an ASHP - is this the right stuff to use in this situation?

Fixed end of last week, seems to be holding pressure fine

If you can't see it from your property why do you want to remove it?

We had a 170m2 200mm slab put down and powerfloated with a graphite coloured dry shake on the top, came in at about 4k ex-vat IIRC.

The plumbers were meant to be repairing this, and they were the ones who actually connected the loops to the mannifold and commissioned it all before screeding, so they should have been well aware of all the pipes. Just seems like this information didn't filter down to the genius with the lump hammer

@Joe90 do you want to tell me how good your builder was again? 😄 I think that would finish me off...

Alright alright, come on I need some positives here!

Because I had 24 pipes coming through a doorway and going up a corridor

So a skilled tradesman turned up in site yesterday to expose the damaged ufh pipe ready for the plumber - and promptly put a hole through another pipe. You honestly couldn't make it up

Well I guess the composite sheets form a vapour barrier too, so guess so

yep, but BC insisted we use a vapour barrier to be sure

Our roof is corrugated steel sheets over 150mm thick PIR/composite panels and the rain was quite loud. We've now finished the internal pitched ceiling with 200mm thick rockwool (just standard stuff, not acoustic) behind PB and can't hear anything anymore. Just the slight echo of my empty bank account.

If you've got an UFH mat then solid wood might not be best, engineered better

Didn't pursue any further tbh, opted for the usual ASHP and UVC in the end, hopefully being fitted end of March - better late than never!

Heard back from the plumber and he would prefer to use a press-fit coupler rather than the standard compression. I said I was happy to go with whatever he recommended but any reason not to use a press-fit here? He said more reliable...

Only one pipe is damaged - the other two white marks are where I painted around the pipe in white emulsion to highlight it. That and marking where the pipe was on a floor plan and telling them to not to effing go near it I thought would have been sufficient, clearly not!

Yep