MegaSack DRAW - This year's winner is user - rgwb
We will be in touch
Lol! You’re literally arguing with yourself. 🤣 Still; at least you’ve now become more knowledgeable about the CRA 2015 as a result of all this, so let’s take that as a win.
I'm well aware of the legislation thanks, I just didn't see the need to copy and paste it in response to the half-story you initially described.
Anyway. How's the OP getting on?
Do not run 40mm waste behind the integrated dw. By the time you space it off the wall there’s usually not enough room. Some guys use 2 x washing machine drain hose to get to the appliance trap.
Feel free to ignore, amend or delete as applicable, ad i say im. No plumber.
Also, check and double check that your sink holes/sizes are well clear of your dishwasher (if it's next to the sink). Otherwise you may have to 'adjust' the casing of your dishwasher with an angle grinder. 🙂 *
*kitchen fit in my first flat. Other top bodges included chiselling a slot in the wall to accommodate the end of the worktop because the corners weren't square.