Chapter 12.20
SIDE SEWERS
Sections:
12.20.070 Pipe specifications – Testing.
12.20.110 Serving buildings with basements.
12.20.140 Installation excavations.
12.20.150 Joints and connections.
12.20.160 Superintendent notification – Inspection.
12.20.180 Charge for unplugging stoppages.
12.20.020 Fees.
The user or his agent shall make application on a form furnished by the city providing for plans, specifications and other information required to show compliance with the city’s ordinances and shall pay permit fees as set by resolution of the city council. Such application and fees shall be required for initial connections of a side sewer and for extension, alteration or repair of existing side sewer service line. All costs and expenses incurred by city incident to the cost of installation, repair, or extension of side sewer service line shall be borne by the application. (Ord. 361 § 3, 1980; Ord. 280 § 1, 1974).
12.20.070 Pipe specifications – Testing.
Building sewers shall be of cast iron soil pipe conforming to federal specification WW-P-401, Class B with lead or rubber gasketed joints, asbestos cement pipe with rubber ring joints conforming to federal specification SS-P-331a, clay pipe conforming to ASTM C-200-64T, ASTM C-278, or C-463 and Clay Pipe Institute West Coast Standards, with factory-made compression joints conforming to ASTM C-425, or concrete pipe conforming to ASTM C14-63. Plastic pipe ABS or PVC schedule 40 DWV pipe, IAPMO approved, and conforming to ASTM D2665-68 may be used in sizes of four inches and larger. It shall be installed in a sewer system in accordance with IAPMO standards. (Ord. 233, 1970; Ord. 168 § 6(A), 1965).
12.20.080 Adaptor.
Side sewer connections shall be made on the house side of the septic tank to the existing cast iron soil pipe, or approved existing asbestos cement or clay pipe. When connecting cast iron soil pipe to asbestos cement, clay or concrete pipe, a special approved adaptor shall be used. Connection of the side sewer to the city sewer shall be with an approved adaptor. (Ord. 168 § 6(B), 1965).
12.20.090 Clay tee.
The first fitting at the connection with the public sewer and the side sewer shall be an A.C. or clay tee, furnished by the owner. The tee branch shall be sealed with an approved cap or plug. Such tee shall be used for inserting a test plug for water testing the side sewer and as an auxiliary cleanout. Backfilling around the tee shall be done in such a manner so as not to damage the pipe. (Ord. 168 § 6(C), 1965).
12.20.100 Size – Slope.
The size and slope of the side sewer shall be subject to the approval of the superintendent by application of standards approved by city code, and in no event shall the diameter be less than four inches. The slope of such four-inch pipe shall not be less than one-fourth inch per foot, unless otherwise approved by the superintendent and in no case shall grades be flatter than one-eighth inch per foot. (Ord. 168 § 6(D), 1965).
12.20.110 Serving buildings with basements.
Side sewers serving buildings with basements shall be brought to the building at an elevation below the basement floor whenever the location of public sewers will permit. (Ord. 168 § 6(E), 1965).
12.20.120 Grade – Alignment.
The side sewer shall be laid at uniform grade and in straight alignment so far as is possible. Changes in direction shall be made only with curved pipe with no greater than 45-degree bends. All bends shall include a clean out. All pipe shall be laid on a firm earth bedding containing no material larger than one inch. If the trench bottom contains mud or water the pipe shall be laid on a four-inch granular base of three-fourth inch minus rock, pea gravel, sand or combination thereof. Backfill around the pipe and to a point four inches above shall be selected trench-side material hand placed and hand tamped, with no material larger than one inch. (Ord. 168 § 6(F), 1965).
12.20.130 Low building drain.
In cases in which a building drain is too low to permit gravity flow to a public sewer, sanitary sewage carried by such drain shall be lifted by approved artificial means and discharged to the side sewer. Specification for installation shall require a pumping unit similar to and equal to PACO Model 3AR as manufactured by Pacific Pump Company. Sewer pipe from building to service line shall be not less than three inch and have cleanout fitting at building connection. When lines extend from the building more than 100 feet, additional cleanouts must be installed not exceeding 100 feet apart. Plastic pipe and fitting shall be Type lPV Schedule D.O. as supplied by Western Plastics Corporation, Tacoma, Washington, or equivalent. Pipe shall conform to U.S. Commercial Standards CS207-60 and shall be N.S.F. approved. Cast iron pipe shall conform to Federal U.S. Tyton joint pipe manufactured by U.S. Pipe and Foundry or its equivalent. Fittings for use with rubber-gasket joint pipe shall be mechanical joint, Class 150. Pipe thickness class shall be 22.
Copper pipe and fittings shall be, Type K, hard-drawn copper, ASTM B88, with commercially pure copper solder joint fittings, joints with silver solder brazing alloy. (Ord. 221 § 1, 1969; Ord. 168 § 6(G), 1965).
12.20.140 Installation excavations.
All excavations for the installation of a side sewer shall be open trench work unless otherwise approved by the superintendent. No backfilling of the trench shall be done until receipt of written approval from the city. Minimum cover shall be one foot six inches above the top of the pipe. (Ord. 168 § 6(H), 1965).
12.20.150 Joints and connections.
All joints and connections shall be made gastight and watertight. (Ord. 168 § 6(I), 1965).
12.20.160 Superintendent notification – Inspection.
The side sewer permittee shall notify the superintendent when the building sewer is ready for inspection and connection to the public sewer. A city approved air test or a 30-minute internal hydrostatic test will be required on all side sewers before connection is made to the building drain. All water, plugs, and other facilities for making the test shall be furnished by the city. Minimum head over the top of the pipe shall be two feet and maximum allowable leakage shall be four gallons per hour per 100 feet. No heads in excess of 16 feet over the lowest point of the pipe tested shall be allowed. All water tests shall be made with city furnished or approved equipment. After testing and approval for the building sewer by the superintendent, the user shall make the final connection to the building drain unless otherwise restricted by the superintendent. (Ord. 168 § 6(J), 1965).
12.20.170 Joint side sewer.
Two property owners may construct a joint side sewer. In such a case a clean-out shall be installed at the point of common connection, and a six-inch line will be required from the point of common connection to the service connection. A four-inch line shall be installed between the clean-out and the building. The property owners shall grant a permanent sewer easement 10 feet wide to the city from the service connection to the clean-out. (Ord. 168 § 6(L), 1965).
12.20.180 Charge for unplugging stoppages.
A charge of $10.00 will be made by the city for unplugging side sewer stoppages. (Ord. 168 § 6(M), 1965).