Do I have to put the end of the agi pipe into a drain or just cover it over?
Welcome to the Bunnings Workshop community @comptonkath. It's wonderful to have you join us, and many thanks for your question about installing agi pipe.
One end of your pipe needs to feed into a stormwater pipe, allowing water from the area to flow into the drain. If you don't connect that end to the stormwater, you'll have pooling water in that location. The opposite end, furthest away from the stormwater, requires an end cap.
You might like to have a read through these helpful guides: How to install garden drainage and How to fix a muddy lawn.Please let me know if you have other questions or need further assistance.
Mitchell