Water butt from combined rain and greywater.
I'm looking to get a water butt. The issue is the only downpipe combines the guttering to the output from our bathroom (a sink and bath only - no toilet of course). I understand one can use greywater in the garden, though it can cause issues due to soap, toothpaste, hair bleach and cleaning products.
If this is combining the rainwater from the roof will it all be so diluted it won't cause an issue? I could always disconnect the downpipe while cleaning or when the Fiancee bleaches her hair!
Any input would be appreciated