South Carolina Code of Regulations
Chapter 103 - PUBLIC SERVICE COMMISSION
Article 7 - WATER UTILITIES
Subarticle 5 - ENGINEERING
Section 103-750 - Requirement for Good Engineering Practice

Universal Citation: SC Code Regs 103-750

Current through Register Vol. 47, No. 12, December 22, 2023

A. The water plant of the utility shall be constructed, installed, maintained and operated in accordance with accepted good engineering practice and regulations included to assure as far as reasonably possible, continuity of service, uniformity in the quality of service furnished, and the safety of persons and property.

The design and construction of the water plant shall conform to the requirements of the South Carolina Department of Health and Environmental Control.

B. Disinfection of facilities. All new mains, pumps, tanks, wells and other facilities for handling potable water, repaired mains and other facilities, shall be thoroughly disinfected before being connected to the system. The method of disinfection shall be as approved by the Department of Health and Environmental Control.

1. Mains.
A. Depth of Mains. Water mains should be installed below the frost line or be otherwise protected to minimize the possibility of freezing and shall not have less than 30 inches cover except where it is necessary to avoid underground obstruction or rocky or hardpan conditions where such depth is not feasible, provided such deviation is approved by the Department of Health and Environmental Control.

B. Dead Ends. The utility should design its distribution system so as to avoid dead ends in mains. Where dead ends cannot be avoided the mains shall be flushed as often as necessary to maintain the proper quality of the water. Any dead end which is longer than 200 feet must have a blowoff valve at end of line.

C. Segmentation of System. Valves shall be provided at reasonable intervals in distribution mains so that in case of breaks or repairs a minimum number of customers will be affected. When feasible, valves shall be provided at intersections of mains and in the mains at intervals not to exceed one continuous block or 500 feet, whichever is greater, except where a dead end run is not intended to serve any intervening customers.

D. Grid Systems. The distribution system should be laid out in a properly segmented grid so that in case of breaks or repairs a minimum number of customers will be affected.

E. Minimum Pipe Sizes. This distribution system shall be of adequate size and designed to maintain the pressures within the range required by 103-774. The pipe used in the system should be at least 4 inches in size. In special cases, pipes of the sizes listed below may be installed. However, the maximum length from any connecting main at least 4 inches in size should not exceed the following:

1-inch .......................................................

150 feet

1 1/2 -inch ..................................................

300 feet

2-inch ......................................................

1500 feet

Disclaimer: These regulations may not be the most recent version. South Carolina may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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