The in-sump is attached to the last section of drain for easy installation.
Cut the hole for the outlet with a hole saw and if required seal the gap between the hole and outlet pipe with:
...prior to the concrete pour.
The UniSeal™ can be purchased from www.uniseal.co.nz
Note: The in-line sumps are supplied without the outlet hole drilled to provide onsite flexibility in terms of location and hole diameter.