<?xml version="1.0" encoding="UTF-8" standalone="no"?><?Xpress productLine="ncc-clause" ?><clause xmlns:xt="urn:xpressauthor:trackchanges" id="_b315653d-dd12-4a8b-9188-f868f3f99fa5" outputclass="ncc-clause"><sptc>C2P4</sptc><title id="_6037363c-628f-4384-9fed-906a572a1f78">Ventilation</title><archive-num>2019: CP2.1</archive-num><subclause id="_7789638e-eb5d-457a-a14d-a8734fe8f972" outputclass="subclause"><title id="_aac1efea-fe72-4d13-bb9d-17974f0a02b7">SubClause</title><num>1</num><p>A sanitary <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1249_0.8.0.xml#_25307451-c7e1-4167-b4de-e5a1af26694c" id="_d9b3b630-504d-4f0f-8c64-eb734ea53449" referencetype="Text" scope="local" synctargettext="false" type="abcb-glossentry">drainage</xref> system must ensure there is adequate ventilation to avoid foul air and gases accumulating in the sanitary <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1249_0.8.0.xml#_25307451-c7e1-4167-b4de-e5a1af26694c" id="_cbaf6a90-b8e5-48ff-b6a9-a17de3f76b70" referencetype="Text" scope="local" synctargettext="false" type="abcb-glossentry">drainage</xref> and sewerage system.</p></subclause><subclause id="_0a1903d4-eae0-491f-9d41-c6058dd68c79" outputclass="subclause"><title id="_1c8c66bc-e023-4a98-9922-5da7c192572e">SubClause</title><num>2</num><p>A sanitary <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1249_0.8.0.xml#_25307451-c7e1-4167-b4de-e5a1af26694c" id="_1a2c9cf3-a4b4-4471-9789-e7a019e30bcc" referencetype="Text" scope="local" synctargettext="false" type="abcb-glossentry">drainage</xref> system must ensure that ventilation is provided to avoid hydraulic load imbalance such that—</p><ol outputclass="alpha"><li id="_2e23cccf-6f65-4c9a-afdf-095e9f44edb7">there is less than a 1% likelihood during the <xt:delText xt:action="start" xt:author="Jerome Samuel" xt:dateTime="2024-09-25T13:28:00" xt:id="15a68dde-572d-4511-b751-02d137a11304"/>annual <xt:delText xt:action="end" xt:id="15a68dde-572d-4511-b751-02d137a11304"/>peak hour that when any fixture discharges, air pressure at any trap seal exceeds ±375 Pa difference from atmospheric pressure; or</li><li id="_36444ce9-ebb4-40dc-966a-41d1680233f6">an <xref format="dita" href="/tmp/QppServer/Publishing/5e2c1f63-e589-4ce1-95e8-5c3e286a7aff/1260_2.0.0.xml#_6a914e67-bc6e-4499-8316-001bc4729a09" id="_0095fabe-e4a5-42fd-8824-e5d5093fd47d" referencetype="Text" scope="local" synctargettext="false" type="abcb-glossentry">equivalent</xref> level of safety to human health is achieved as a system complying to (a).</li></ol></subclause></clause>