After deciding I wanted to keep my grey water onsite but finding the commercial products a little on the expensive side I went looking for cheaper alternatives.
My first attempt was a 200L drum outside my bathroom connected to the waste outlet from my bath, lined with some rudimentary filters and draining to the garden via 19mm poly pipe. This was a failed experiment with a positive outcome. I quickly discovered where grey water gets it’s name from – when stored for any length of time this is the colour it quickly turns.