§ 74-186. Materials and methods.

Except as may be provided otherwise by the building code:

(1)

Materials. The building sewer shall be of suitable material approved by the superintendent and shall be one of the following:

a.

Cast iron soil pipe, ASTM specifications A 74-42 or equal.

b.

Vitrified clay sewer pipe, ASTM specifications C 13-54T or equal.

c.

Concrete pipe, ASTM specifications C 14-56.

d.

Other suitable material approved by the superintendent.

No new construction of pipe classified as "orangeburg" or similar plastic will be approved. Joints shall be tight and waterproof. Any part of the building sewer that is located within ten feet of a water service shall be constructed of cast iron soil pipe with leaded joints. The entire pipe installation shall be subject to approval by the town manager.

(2)

Size and slope. The size and slope of the building sewer shall be subject to the approval of the town manager, but in no event shall the diameter be less than four inches. The slope of such four-inch pipes shall not be less than one-eighth inch per foot. No ells shall be used in the line except with the permission of the town manager. A cleanout plug shall be inserted in each line at a suitable point.

(3)

Elevation. Whenever possible the building sewer shall be brought to the building at an elevation below the basement floor. The depth shall be laid at uniform grade and in straight alignment. Change in direction shall be made only with properly curved pipe and fittings, approved by the town manager.

(4)

Lift where no gravity flow. In all buildings in which any building drain is too low to permit gravity flow to the public sewer, sanitary sewage carried by such drain shall be lifted by approved artificial means and discharged to the building sewer, at the expense of the property owner.

(5)

Excavations. All excavation required for the installation of a building sewer shall be open trench work, unless otherwise approved by the town manager. Pipe laying and backfill shall be performed in accordance with ASTM specifications C 12-19, except that no backfill shall be placed until the work has been inspected by the town manager.

(6)

Joints and connections. All joints and connections shall be made gastight and watertight. Cast iron pipe joints shall be firmly packed with oakum or hemp and filled with molten lead, Federal Specifications Q.Q-6-156, not less than one inch deep. Molten lead shall be run in one pouring and caulked tight. Lead joints, other than poured, will be permitted only by special approval of the town manager. No paint, varnish or other coatings shall be permitted on a jointing material until after the joint has been tested and approved. All joints in vitrified clay pipe or between such pipe and metals shall be made with approved hot-poured jointing material or cement mortar as follows:

a.

Material for hot-poured joints shall not soften sufficiently to destroy the effectiveness of the joint when subjected to a temperature of 160 degrees Fahrenheit, nor be soluble in any of the wastes carried by the drainage system. The joint shall first be caulked tight with jute, hemp or similar approved material.

b.

Cement joints in clay and cement pipe will be permitted, but are not recommended. Cement joints shall be made by packing a closely twisted jute or oakum gasket of suitable size to fill partly the annular space between the pipes. The remaining space shall be filled and firmly compacted with mortar composed of one part Portland cement and three parts mortar sand. The material shall be mixed dry, and only sufficient water shall be added to make the mixture workable. Mortar which has begun to set shall not be used or retempered.

c.

Other jointing materials and methods may be used only by approval of the town manager.

(Code 1992, § 17-36)

(Code 1992, § 17-36)