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Virginia Administrative Code (Last Updated: January 10, 2017) |
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Title 12. Health |
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Agency 5. Department of Health |
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Chapter 590. Waterworks Regulations |
Section 1120. Minimum pipe size
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A. The minimum size pipe for water distribution systems shall be four inches in diameter.
Pipes of lesser diameter may be used in the following instances:
1. When the run is less than 300 feet, two-inch pipe may be used; and
2. When the run is less than 600 feet but more than 300 feet, three-inch pipe may be used.
B. The minimum size of pipe where fire protection is to be provided or required shall be six inches in diameter.
C. The standard grading schedule of the Insurance Services Office and other related organizations shall be followed in other cases.
D. Any departure in sizing shall be justified by hydraulic analysis and future water use and can be considered only in special circumstances.
E. Water mains not sized to carry fire flows shall not be connected to fire hydrants.
Historical Notes
Derived from VR355-18-012.02 § 3.49, eff. August 1, 1991.