Grohe Sink Trap doesn’t fit pipe

Profic · Feb 9, 2019

Hi All,
We recently purchased a Grohe sink and sink trap. However the Grohe pipe is smaller than the standard fitting. Have tried local plumbers merchants and supplier to get an adaptor but no one seems to be able to supply one.
looking for a 32mm - 34mm adaptor.
Any suggestions?

Aire · Feb 9, 2019

You need a 1 1/4" compression fitting

snowhead · Feb 9, 2019

Bathroom / Vanity unit?
Should work with this;
https://www.NoLinkingToThis/p/floplast-wc10-universal-compression-waste-bend-90-32mm/90571

Profic · Feb 9, 2019

The Grohe bit is 32mm but the wall fitting is 34mm. Ideally looking for a 32mm - 34mm adaptor? Or plastic ends with the different sizes?

ShaunCorbs · Feb 9, 2019

11/4 compression elbow

rpm · Feb 9, 2019

Certainly wouldn`t reuse what`s in the photo regardless of whether it fitted or not!

Riley · Feb 9, 2019

Def 1.25” compression

oz-plumber · Feb 10, 2019

That fitting under the plastic elbow in the picture, is the fitting I think you use to connect the horizontal pipe from the trap, to the pipe coming out of the wall.

You will either need a pipe socket to 40mm or 32mm thread. (depending on the thread size of the fitting )

That's how we do them.
Some people just push the trap pipe inside the PVC pipe and silicon it.
I wouldn't recommend this method

Riley · Feb 10, 2019

Isn’t that fitting just a shroud for where it passes through the wall

oz-plumber · Feb 10, 2019

More explanation:
The fitting in the bubble wrap is the shroud ( left side of pic )

Fitting under ( right side of plastic elbow) is the fitting that seals the chrome pipe to a threaded fitting coming out of the wall

Aire · Feb 10, 2019

oz-plumber said:
More explanation:
The fitting in the bubble wrap is the shroud ( left side of pic )

Fitting under ( right side of plastic elbow) is the fitting that seals the chrome pipe to a threaded fitting coming out of the wall

So that fitting next to the elbow threads onto a typical 1 1/4" compression fitting and acts as a push fit adaptor?

Riley · Feb 10, 2019

Sorry oz yes, If I open my eyes I will see

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Grohe Sink Trap doesn’t fit pipe

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