Basin waste / trap - help!

[jjcd]

Hi all,

I'm having a bit of trouble with working out what I need for my new bathroom basin waste/trap.

I've fit the bathroom and we have 40mm solvent weld waste pipe coming up inside the (left corner) vanity unit. We then have this sink:

https://www.diy.com/departments/goodhome-lana-whit...

This came with a waste kit with sprung/click-clack waste and overflow but they are both terrible quality so I'd intended to replace with McAlpine etc..

I'm struggling to find the parts partly because I think I'm searching the wrong terms. I'd like a 40mm sprung waste (will need to be unslotted?) but I dont know what parts I need to connect the sink overflow in to the trap? Can i use a trap with an appliance connection/fitting? I can't find anything specific but can't be the first to have this issue. Happy to reduce to 32mm and connect into my 40mm if needed as this is only a basin.

Thank you!!

[No ideas for a name]

Fundamental bits;
Basin waste should be 1 1/4 (32mm).
You will need slotted if you have an overflow in the sink.
Use a proper basin seal rather than the one you get with it.

So, 32mm waste, and trap, then a suitable adaptor to get on to the 40mm outlet.

Take care that push fit and solvent weld are different materials and different sizes!

ETA: Looks like - from the B&Q site - that the basin has a separate overflow rather than one being cast in to the ceramic. Reviews of that part don't seem to be great, so you might need to source a new overflow system too.

Edited by No ideas for a name on Monday 22 April 14:48

[Rough101]

Kitchen sink traps are 40mm, you could use that as long as you’ve a 40mm waste.

Otherwise just reduce from 40mm to 32mm before the trap

[TimmyMallett]

Replace the sprung ones with normal. IME replacing with more expensive ones means you just end up replacing them again in a year when they seize in the same way the original ones did and wish you hadn't wasted the money....

[jjcd]

No ideas for a name said:

Fundamental bits;
Basin waste should be 1 1/4 (32mm).
You will need slotted if you have an overflow in the sink.
Use a proper basin seal rather than the one you get with it.

So, 32mm waste, and trap, then a suitable adaptor to get on to the 40mm outlet.

Take care that push fit and solvent weld are different materials and different sizes!

ETA: Looks like - from the B&Q site - that the basin has a separate overflow rather than one being cast in to the ceramic. Reviews of that part don't seem to be great, so you might need to source a new overflow system too.

Edited by No ideas for a name on Monday 22 April 14:48

Thank you - that's really helpful. Happy to use 32mm waste and trap + adaptor.

The last bit is what i was struggling with - it has a separate overflow (I will search for another) and i'm not sure how to connect that into the trap? The B&Q supplied trap has a connection for it (but terrible quality).

[Rough101]

jjcd said:

Thank you - that's really helpful. Happy to use 32mm waste and trap + adaptor.

The last bit is what i was struggling with - it has a separate overflow (I will search for another) and i'm not sure how to connect that into the trap? The B&Q supplied trap has a connection for it (but terrible quality).

The overflow connects to the waste collar, not the trap.

[jjcd]

Rough101 said:

The overflow connects to the waste collar, not the trap.

Ah I didn't realise that - that will help my search!

Thank you.

[miroku1]

What’s been said is correct BES sell the kit you need it’s part number 10257 .
That will give you an idea as to what you require, you’ll then need a 32mm or 1 1/4 trap to suit