I needed to adapt a telescopic sink waste pipe to a non-telescopic bottle trap. This adapter worked perfectly. I didn't know these existed, I found it browse the Toolstation web site.
Required to provide the second compression connection on the OSMA 32mm in-line waste valve. I couldn't find a cheaper, available alternative to enable the job to go on.
Having bought a Hep2O dry trap realised it could not be fitted in the pipe line without this adaptor. Tool Station had one in stock which meant I could complete the job.