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it all started with a large cleared area in my small backyard and the purchase of an "L" shaped Raised Garden bed.
HI @MrCee
Welcome to the Bunnings Workshop community. Thank you for joining the discussion.
If you're drilling through steel, I suggest using a Bi-metal Hole Saw. These hole saws are rated for drilling through mild steel, timber, and plastic.
When choosing the size of the pipes, it is often based on the size of the raised garden bed. You'll notice that in the first post the raised garden bed used is The Organic Garden Co 150 x 150 x 41cm Zincalume L-Shape Raised Garden Bed. It is 410mm tall and the pipe used looks like a 90mm stormwater drain. If you were to use a smaller garden bed a smaller pipe set would be needed. Using a large pipe set would take up too much space and there would not be enough soil for the roots to grow in.
Pipe height is roughly based on the size of the garden bed. The majority of the wicking beds I've seen online have a pipe height at least twice the height of the raised garden bed. I suppose this is done for convenience and guarantees that no soil will enter the top of the pipe.
Are you building your own wicking bed? Any updates you can provide would be much appreciated.
If you need further assistance, please let us know.
Eric
