How to connect 100mm shower trap to 90mm drain?

[AndrewF]

My plumber installed a 100mm trap for the shower and raised it above the floor, now I have to connect my drain from Bunnings that has a 90mm hole under the grate. How exactly am I meant to connect the two?

I have reached out to the plumber to solve this issue but he is unresponsive.

[EricL]

Hello @AndrewF 

Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about your shower drain.

Depending on the type of drain you've purchase, a PVC reducer is usually used to connect pipes that are going from one size to another. But in saying this your plumber should be the one installing the shower waste for you. In order to give our members a better idea of the waste you've purchased, would it be possible for you to post a picture or tell us the Bunnings item number of the product? We can then make recommendations on how to proceed.

If you have any other questions we can help with, please let us know.

Eric