Okla. Admin. Code § 252:624-3-2

Current through Vol. 41, No. 19, June 17, 2024

Section 252:624-3-2 - Design and construction of distribution systems

(a)Minimum pressure of 25 psi. The distribution system shall be designed and constructed to maintain a minimum pressure of twenty-five (25) psi throughout the distribution system under normal operating conditions including peak demand.

(b)Material specifications. All materials used in the construction of the distribution system, including piping, fittings, valves, gaskets, packing and other joint materials, shall meet the latest specifications issued by AWWA, ASTM, NSF, or ANSI for use in public drinking water supply systems. When distribution lines are installed in soil or groundwater that is contaminated by organic compounds, the pipe and joint materials shall be made of materials that are not subject to permeation by organic compounds.

(c)Sizing of water lines. Water lines shall be sized to furnish water at the volume and pressure required by the most current International Plumbing Code.

(d)Separation of water lines from potential sources of pollution. The following are the required horizontal and vertical separation distances between water lines and potential sources of pollution.

(1)Horizontal separations. Water lines shall be located a minimum of:

(A) five feet (5') from any existing or proposed storm sewers, septic tanks, aerobic treatment units, trash tanks, sewage pump tanks, raw water lines, petroleum product lines, natural gas lines and other buried utility lines.

(B) ten feet (10') from any existing or proposed sewer line.

(C) fifteen feet (15') from any on-site sewage dispersal field.

(D) ten feet (10') from any petroleum underground storage tank and/or line, when the water lines are made of cast iron.

(E) fifty feet (50') from any petroleum underground storage tank and/or line, when the water lines are made of PVC.

(2)Vertical separations. When a water line crosses a sewer line, there shall be a minimum vertical separation distance of twenty-four inches (24") between the water line and the sewer line. The piping shall be arranged so that the joints in the water line do not cross within ten feet (10') of any joints in the sewer line.

(3)Special conditions. When it is impossible to obtain the horizontal and vertical separation distances listed in this Subsection, the sewer shall be constructed equal to water line specifications.

(e)Depth of water mains. Water mains shall be installed at least thirty inches (30") deep or have sufficient insulation to prevent freezing.

(f)Bedding for water lines. Water lines shall be bedded in rock-free material to a depth of at least six inches (6") below the bottom of the pipe. The bedding material shall be tamped in layers around the pipe and to a sufficient height above the pipe to adequately support and protect the pipe.

(g)Blocking. Reaction blocking, tie rods, or joints shall be provided to prevent movement of the water line at all tees, bends, plugs and hydrants.

(h)Dead ends in water main. An approved flushing hydrant or blow-off valve shall be installed at each dead end in the water main. Flushing devices shall not be connected directly to any sewer.

Okla. Admin. Code § 252:624-3-2

Added at 25 Ok Reg 2294, eff 7-11-08

Amended by Oklahoma Register, Volume 34, Issue 24, September 1, 2017, eff. 9/15/2017