HCC §21-22
Rules for building sewer connections
Read the official text at hawaiicounty.gov ↗This section sets the size and slope for sewer laterals and how they connect to the main. It also says the connection must be inspected before it is covered. The rules apply to anyone building or connecting a sewer line.
contractorsdevelopershomeowners
The ordinance, as written (Hawaiʻi County) — Construction specifications
A copy, taken August 21, 2026. The version published by Hawaiʻi County is the one that governs, and it may have changed since. Check it before relying on anything here.
(a) All laterals shall be six inches in diameter and constructed at right angles to the main on a minimum grade of nine-tenths of one percent, unless excepted by the director. Each lateral shall terminate at the property line with a six-inch by four- inch cast iron pipe reducer, properly capped. (b) Connection of the building sewer to this reducer shall be made with a forty-five degree cast iron “Y,” with the branch facing upward and extended about one inch above the ground with a four-inch brass cleanout at the end. This connection shall not be backfilled or covered until approved by the director.
Published by the County of Hawaiʻi Office of the County Clerk.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.