HELP! why won't a 'P' trap and sink waste fit together?

[bazmdiy]

Hi - help needed!!! Just bought parts to fit sink and wastes and hit sort of silliness only a green DIYer would hit !!!

Bought this sink waste from screwfix code 57005
Bought this P trap from screwfix code 12794

Sink waste didn't come with any washers (as shown on screwfix website) or other fittings. The problem is the metal threaded part of the sink waste is too small for white nut on P trap.

I expected them to screw together

Untitled

• bazmdiy
• 11 Sep 2014
• 1

 

[picasso]

What are you trying to fit the bits to, a kitchen sink or a wash hand basin?

 

[longdogs]

That's a basin waste and a sink trap.

For a basin waste you need a 32mm trap

For a sink waste you need a 40mm trap

 

[bazmdiy]

Yep - the penny dropped big time before I could announce my revelation!

That is one sink solved - however, my wife also wants a BIG butler sink fitting and for that I guess I'll need 40mm P trap. Any suggestions where I get sink wastes for 40mm trap? The ones on screwfix don't state what trap size (they are all presumably 32mm). Thanks for help.

 

[bazmdiy]

I just did a google on "40mm sink waste" without much joy. But "1.5" sink waste" gives what I'm after. Good old imperial not quite dead... Thanks for replies.