Some of the hardest work we’ve done will never be seen by anyone. (I’m not complaining – it’s just one of those things.) The grey water treatment from the outdoor kitchen sink is not a good example – it was really quite easy.
We took a (free) bath and put a load of washed gravel in it:
More mulch was added, and some plants. But you get the gist. Before it gets here, water drains from the sink, through some straw in a box, and along a pipe under the kitchen paving. (The kitchen paving – that was hard work.)