Gullies: Air tightness (NT VVS 037)

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  • Report #: NT VVS 037
  • Approved: November 1985
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This NORDTEST method is designed to ascertain whether the gully trap is sufficiently tight to prevent passage of foul gases from the drainage system.


Nordtest is a trademark of Nordic cooperation in conformity assessment. The emphasis of Nordtest is to develop, promote and innovate Nordic test methods and pre-normative activity. Nordtest endeavours to remove technical barriers to trade and promotes the concept: “Approved once, accepted everywhere”.