only connect tubs > and showers to "greywater" system. > Gareth Many years ago, when I was a teen ager, my sister had their bathtub drain pipe go all the way out to their garden, and a rather elaborate moat system, which worked like a charm, and they always had a great vegetable garden. My neice was in the bathtub, having a bath, and I was at their place visiting, when I got this fiendish idea....make a howling noise up the pipe!! Well, my neice, who was about nine yrs old, heard that noise coming out of the bathtub overflow hole, and started to scream blue bloody murder! That was sixty years ago, and she is still trying to get even! As some of you may have noticed, my sense of humour has not diminished....Cheers, Doug in BC, whose habs and cayennes, are blooming like crazy, and Calvin's white stuff, aint coming down outta our skys!