28mm copper waste to 32mm plastic

[flyingsparks]

Hi guys I have an old basin waste which is a 28mm copper pipe, I want to re use the majority of the exsisting pipe and renew with a 32mm plastic up through the floor to the new sink i'm putting in. What is the best way to connect the 32mm plastic to the 28mm coper? Thanks Chris

 

[xr4x4]

Compresssion coupling?

 

[stardanny]

Hi Chris.

Are you sure it's 28mm copper pipe? Should it be 35mm?

You can use a white waste pipe compression coupling but you may have trouble sealing onto 28mm copper pipe.

Dan.

 

[flyingsparks]

Hi Dan, yes i'm pretty sure from memory its 28mm Its not at home its at my inlaws. Hmm.. I thought about compression but did think i'd struggle to get it to seal with a 4 mm difference. How would wrapping ptfe tape around the copper to get its diamater up, would that work? Cheers.

 

[newbuildinstaller]

Get a McAlpine T12R its a rubber reducer going from 35mm to 28mm

never heard of or used a 28mm waste?!?! Id upgrade it!