See if you can get a measurement on the cut out underneath and fingers crossed your current sink just has a bigger flange
Alternatively if you have space to open the hole up further and a big base unit you could stick a double in...
what you're after to go on the top of the trap is a polypipe ws47w
Choice is yours on how you do it but you're looking at reddit which is mostly used by Americans who are advising you on American plumbing practices. We don't worry so much about venting and inspection hatches for basin wastes...
The bit you're trying to attach something to fits to the basin. You then come out the horizontal section with a bit of 32mm pipe. Do the same for the other side and then using some fittings get them to meet into the tee ensuring that the swept tee faces the right way.
You've chosen an anti vac...
Personally at that size UFH I would want a pump on it and because its screeded its own time and temp control so go down the route of a small manifold. This will mean it needs to be tee'd into the boiler flow and not the heating flow. Basically you need a pipe back to your airing cupboard or...
Remove the stopcock and put a new piece of pipe in joined to the old pipe with the joiner somewhere that's not under the new patio. Then fit isolation to the supply as it exits the ground.
Of if you can replace the whole lot back to where it is supplied from that would be even better, no joins...
Modern plumbers don't typically get involved in appliance repairs. Its a specialist subject. You may be better off asking else where.
At 8 years old I would replace.
What pan connector are you using and I'll see if I can find you a brand with a removable rubber.
Fitted one beggining of this year and think I had to do the same.
Pretty sure all sigma plates will fit all sigma cisterns otherwise they would be a different name. The numbers I presume refer to cistern depth
I had issues with the colouring on some sigma plates a few weeks ago. I sent an email to [email protected] explaining what I needed and asked...
Have you checked you have 240v going into and out of the room stats? They might be switching via low voltage battery or the relays aren’t working. You need to trace the electricity step by step forward or backwards in the switching order