KCC §14-3.3
Flood protection rules for drainage and plumbing pipes
Read the official text at ecode360.com ↗This section sets flood safety rules for drainage and plumbing systems. It requires backwater valves, sealed holding tanks for emergency facilities, and certain pipe heights. It also says pipe openings through walls must be sealed to keep floodwater out.
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The ordinance, as written (Kauaʻi County) — Drainage (Plumbing) Systems
A copy, taken August 22, 2026. The version published by Kauaʻi County is the one that governs, and it may have changed since. Check it before relying on anything here.
Drainage systems that have openings below the base flood elevation shall be provided with an automatic backwater valve installed in each discharge line passing through a building exterior wall.Drainage systems for emergency servicing facilities that are required to remain in operation during a flood shall be provided with a sealed holding tank and the necessary isolation and diversion piping and appurtenances to withhold or postpone sewage discharge to the sewer system during the flood. The holding tank shall be sized for storage of at least one hundred fifty percent (150%) of the anticipated demand for a twenty-four (24) hour period. Vents provided for such holding tank shall terminate at an elevation of at least one (1) foot above the base flood elevation.All pipes in a plumbing vent system shall terminate at an elevation of at least one (1) foot above the base flood elevation.All pipe openings through exterior walls below the base flood elevation shall be flood proofed to prevent infiltration of flood water through spaces between pipes and wall construction materials by use of imbedded collars, sleeves, water stops, or other means as may be approved by the administrative authority.
The County of Kauaʻi publishes this code through eCode360 and states that it is provided for information only and should not be considered the official version of the Code.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.