Piping.
Omaha Municipal Code § 54-112
in effectSec. 54-112. - Piping.
(a) The determination of sizes of pipe, fittings, and valves on the complete main pump suction line from the swimming pool shall be based upon friction losses for piping of not more than six feet per 100 feet of pipe based upon the Hazen-Williams formula using a C factor of 100. The main drain piping shall be capable of carrying of at least 75 percent of the filter flow at the above stated head loss. The skimmer or gutter suction pipes shall be capable of carrying at least 50 percent of the filter flow at the above stated head loss.
(b) All piping on the discharge side of the pump for filtration and to the point for discharge of backwash water from the filter plant shall have pipe sizes determined on a basis of friction losses which shall not be more than 12 feet per 100 feet based upon the Hazen-Williams formula using a C factor of 100.
(c) All pool piping shall be supported to preclude possible settlement which could result in rupture of the pipe lines.
(d) All pipe lines shall have a uniform slope in one direction of not less than three inches per 100 feet. Gravity waste lines around the pool six inches in diameter or smaller shall have a minimum slope of one-eighth inch per foot. Lines larger than six inches in diameter and all outfall waste mains shall be designed with a size of pipe and slope to freely carry the maximum flows required with no surcharge of back-pressure in the lines. All piping and equipment shall be provided with positive means of completely draining all water to prevent damage from freezing.
(e) If plastic piping is used it shall carry the seal of the National Sanitation Foundation (NSF). Selection of material for piping, pool fittings, and filter system appurtenances should consider the possibility of galvanic action and resulting corrosion of exposed metal.
(f) No direct connection between the water supply and a swimming pool or the piping therefor shall be permitted. A six-inch air gap or a surge tank shall be provided to prevent possible back-siphonage between the pool, the piping, and the water supply. Other approved, properly installed backflow prevention devices may be used in lieu of the air gap. Where the water supply has excessive amounts of iron or manganese, a make-up tank for treatment shall be provided.
(g) All valves shall be permanently tagged. The various pipes shall be color coded in the following manner:
Backwash line | Brown
Gas line | Red
Portable water line | Blue
Chlorine line | Yellow
Suction line | Gray
Return line | Green
Other chemical line | White
(h) Where facilities are installed integrally in the pool piping system for the operation of a vacuum cleaner, the piping shall be required to produce not more than 15 feet total head loss at the pump, while moving four gallons per minute per linear inch of cleaner head.
(Code 1980, § 54-112)
Source: City of Omaha, Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/ne/omaha/codes/code_of_ordinances?nodeId=OMMUCOCHGEORVOII_CH54SWPO_ARTIIPUCOSWPO_DIV3DECORE_S54-112PIFetched: 10/28/2026