Errm, from the trap the semi-treated water seeps into the ground, or the communal waste-water pipes? Because in the latter case, you shouldn't need the septic tank, while in the former sieves at every outlet (sink, shower etc.) can help reducing especially hair going into the pipes in the first place, thus reducing the need for cleaning.
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branchandroot
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Date: 2012-06-14 06:43 am (UTC)