Article Art. Icle 2
12VAC5-610-720. General.
Article 2
Building Sewers
Sewers referred to in this section are watertight, smooth bore, rigid conduits which convey sewage from a building drain to a pretreatment unit and are not to be confused with public sewers addressed in the Sewerage Regulations. (See 12VAC5-580-10 et seq.)
Statutory Authority
§§ 32.1-12 and 32.1-164 of the Code of Virginia.
Historical Notes
Derived from VR355-34-02 § 4.7, eff. February 5, 1986; amended, eff. May 11, 1988.
12VAC5-610-730. Minimum size.
Sewers shall have a minimum internal diameter (ID) of three inches. Larger sewers may be required depending on projected flows.
Statutory Authority
§§ 32.1-12 and 32.1-164 of the Code of Virginia.
Historical Notes
Derived from VR355-34-02 § 4.8, eff. February 5, 1986; amended, eff. May 11, 1988.
12VAC5-610-740. Slope.
The minimum slope for three- and four-inch sewers is 1-1/4 inches per 10 feet, and for a six-inch sewer is 3/4 inch per 10 feet.
Statutory Authority
§§ 32.1-12 and 32.1-164 of the Code of Virginia.
Historical Notes
Derived from VR355-34-02 § 4.9, eff. February 5, 1986; amended, eff. May 11, 1988; Virginia Register Volume 16, Issue 16, eff. July 1, 2000.
12VAC5-610-750. Materials.
All sewers shall be of cast iron (CI) pipe not less than service weight, schedule 40 plastic pipe, extra strength vitrified clay or other acceptable materials to be evaluated on a case-by-case basis. Bituminous fiber pipe is prohibited. Sewers passing under driveways shall be heavy duty CI or schedule 40 plastic pipe, or other acceptable material to be evaluated on a case-by-case basis.
Statutory Authority
§§ 32.1-12 and 32.1-164 of the Code of Virginia.
Historical Notes
Derived from VR355-34-02 § 4.10, eff. February 5, 1986; amended, eff. May 11, 1988.
12VAC5-610-760. Sewer appurtenances.
A. Joints. Sewer joints shall be of the compression type except that plastic pipe may be welded sleeve or chemically fused.
B. Adapters. Joining of pipes of different sizes and/or material shall be accomplished by use of a manufactured adapter specifically designed for that purpose.
C. Bends. The building sewer shall have a straight alignment where possible. When a straight alignment is not possible ells not exceeding 45 degrees shall be used.
D. Cleanouts. Cleanouts shall be brought to the ground surface and shall be provided every 50 feet to 60 feet along the length of the building sewer. Cleanouts shall be brought to the ground surface for access.
Statutory Authority
§§ 32.1-12 and 32.1-164 of the Code of Virginia.
Historical Notes
Derived from VR355-34-02 § 4.11, eff. February 5, 1986; amended, eff. May 11, 1988.
12VAC5-610-770. Sewer construction.
A. Location. Sewers passing within 50 feet of a nonpublic drinking water supply well or other nonpublic drinking water supply source shall have special construction and pipe materials to provide adequate protection. Special construction constitutes water pipe meeting AWWA specifications, pressure tested (10 feet of water) in place without leakage prior to backfilling. However, under no circumstances shall a sewer come within 10 feet of a nonpublic drinking water supply source.
B. Above grade installation. Sewers constructed above grade shall be adequately supported and protected against freezing. When plastic pipe is used for above grade installation the pipe must be protected against ultraviolet radiation, i.e. shielded against sunlight.
C. Bedding. All sewers shall be bedded to supply uniform support along the length of the sewer.
D. Backfilling and tamping. Sewer trenches shall be backfilled with suitable material free of large stones and clumps of earth and tamped to prevent movement of the sewer as soon as possible after the installation of the sewer has been approved.
Statutory Authority
§§ 32.1-12 and 32.1-164 of the Code of Virginia.
Historical Notes
Derived from VR355-34-02 § 4.12, eff. February 5, 1986; amended, eff. May 11, 1988.