TonyT

That’s a fair point, the 3 sides that are in the wall isn’t a problem, and the front does require a clean. i use a wipe and push it into the gap and pull it along, takes 2 minutes.

Get a tray with an upstand too, saves a lot of future grief!

https://www.tlc-direct.co.uk/Products/QUWS1W.html

Get a price from Mull Joiners Ltd to build a frame on site?

Ditto, they did mine like this last year.

This has some info, not sure if its online, taken 5 minutes to uploads the screenshot , not in a good signal area today

I’m sure there is a British standard for fixings, pretty sure i remember downloading it before I left the free access to all the standards with my last mob

Looks like 2 phase supply, assuming that it’s actually energised at the cut out. bit rough leaving the blue conductor not terminated

https://www.drainagepipe.co.uk/perforated-filter-drain-pre-wrapped-80mm-o-d-x-50mtr-coil-p-FD8050/?keyword=&matchtype=&device=m&campaign=&gclid=Cj0KCQjw18WKBhCUARIsAFiW7JxMA9BBlnr9PqDx4sHtpMME7Sn1mEWjVn3ph3ut7iBgKN136c6RjBYaAsdZEALw_wcB

Which you can confirm with a multimeter

Isn’t it just a volt drop problem so increasing the csa of the conductor would let the distance be greater.

The point where you plan to provide power from should have a line/live, neutral and earth. you don’t need to go back to the consumer unit, unless of course it’s more convenient for cabling reasons

I’ve heard from installers that you should leave a gap in the adhesive I.e. not a continuous bead around the perimeter to let air in.

Still air blocked , flush 1 zone at a time

Don’t let the builder dictate how you want it done after you have researched it, cause 90% of the time his method will be a shortcut to save him time, effort or materials or a combination of all 3. At work I insist that walls/floors are inspected prior to a covering/plasterboard being applied to ensure no shortcuts.

Is that one twin and earth feeding both immersions?

So that’s photos of my 3 phase 22 kw charger. first photo is power in via swa cable and top photo is the socket.

Where will you store 5000 litres of hot water?

I will take a photo of one at work tomorrow if i remember!

My pipe is outside, it’s only 600mm diameter to let a pump float switch and pump sit without obstruction. we could have done it with conductivity probes and a smaller diameter pipe, but the way we did it was simpler and cheaper