under-slab

  1. Z

    How to drain and vent back-to-back toilets

    Good Day, Plumbing Gurus, I am seeking advice on how to properly drain and vent two back-to-back toilets in a symmetrical bathroom layout under a 4" slab on grade foundation with down-turned footers. This is new construction, I am owner/builder, and am new to plumbing and trying to research and...
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