Koi pond settings.
The above link shows how to set your skimmer, bottom drain and flanged pond returns when using our foam lining system.
The bottom drain should be set flush within the concrete, everything else 12mm proud into the pond. Leave the rest to us and we'll seal everything flush with nothing for the fish to snag themselves on.
We seal down into the bottom drain by 2" and apply an belt and braces seal of silicone at the meeting point of our grp and the ABS plastic drain. The same applies to the skimmer.
These are the basics we get asked a lot but if you have any specific enquiries simply let us know and we'll answer promptly.