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5.: <br />. down <br />1 0 It) <br />Waster Grey) water <br />Uses Californis approved <br />Unciersink Air Admittance <br />Vent With Back Flow Valve <br />See Attached Cut Sheet <br />Drawing #1 <br />These 2 Tee's perform <br />the Double Sanitary <br />Tee and due to the <br />height differences they <br />do not allow back flow