Bathroom sink leaking outside the downpipes.

[bawbster]

Bathroom sink was draining very slowly and after numerous attemps to unclog with a plunger, it didn't work. Took off the P trap and gave it a good clean, reassembled it and was leaking from a nut and the plug.
The backnut was broken and one the the seals was warped.
The size of the pipe is 1 1/4" and is PolyPipe, assuming the backnut is also 1 1/4". Where can I get the stuff to repair/replace, had a look on B&Q/Screwfix and toolstation but the biggest backnut is 1" that I can see. Don't even know where to look for seals as that is a minefield in itself.
Any help appreciated.
Thanks.

 

[terryplumb]

Your description isn't specific enough.
Show us some pics. If the parts you refer to are what jons the p trap to waste pipe and basin waste ,just buy a new P trap.

 

[bawbster]

Images as requested. Would prefer to reuse the P trap if possible as the new one may be different length hence asking about rubber seal.. The backnut connecting the waste plug is broken in half and new one is required.

Cheers

 

[Deleted member 267285]

From what you’re describing it sounds like you need a slotted waste backnut, or one of these: https://www.toolstation.com/basin-mate/p37534

(Backnut https://www.cityplumbing.co.uk/Bras...CPTwFJgIowRodHuENQxoC10YQAvD_BwE&gclsrc=aw.ds)

 

[Tricky-Dicky]

Looks like you need a new backnut, as CBW suggested
But adjustable U bend IF needed:
McAlpine Adjustable Inlet Tubular 'P' Trap White 32mm | Traps | Screwfix.com

 

[bawbster]

Cheers guys, got the stuff from my local plumbers merchant and sorted it (hopefully).