Existing building laterals may be used in connection
with new buildings only when they are found, on examination by the
City Engineer, to meet all requirements of this chapter.
At the point of connection of a street lateral
to a main sewer, a standard wye fitting and sufficient one-eighth
forty-five-degree bend fittings shall be used. The wye fittings shall
be installed so that flow in the arm shall transition smoothly into
the flow in the public sewer. No lateral connection shall be made
to the public sewer which permits the flow into the public sewer from
the lateral to enter at right angles.
A. Future connection locations; as-built drawings. The
street lateral, including the wye and eighth bend fittings, shall
be connected to the main sewer at the time of constructing the main
sewer for each proposed lot for either immediate or future development.
Laterals installed for future development shall be fitted a standard
plug approved for use by the City Engineer. All sewer connections
shall be via a properly installed saddle on the main sewer pipe. No
portion of the lateral pipe shall protrude into the main sewer pipe.
The location of all lateral connections shall be field marked with
a two-inch by six-inch corrosion and rot resistant board. The marker
board shall extend from the depth of the lateral to a minimum of two
feet above grade. The location of all lateral connections shall be
indicated on a drawing and four copies of this drawing, showing the
as-built location of these connections, shall be furnished to the
City Engineer. A refundable deposit shall be placed with the City
to assure receipt of these as builts. The deposit shall be placed
when application is made; the amount of the deposit shall be $100
per sheet of plans showing locations of lateral connections. No sanitary
sewer shall be accepted by the City until four copies of this record
drawing have been so filed with the City Engineer and the City Engineer
has approved the submitted drawings.
B. Special manhole requirements. When any street lateral is to serve a school, hospital, or similar institution, or public housing, or is to serve a complex of industrial or commercial buildings, or which, in the opinion of the Superintendent, will receive wastewater or industrial wastes of such volume or character that frequent maintenance of said building or street lateral is anticipated, then such street lateral shall be connected to the public sewer through a manhole. The City Engineer shall determine if and where this type of connection to the public sewer is required. Connections to existing manholes shall be made as directed by the Superintendent. If required, a new manhole shall be installed in the public sewer pursuant to §
456-47 and the lateral connection made thereto as directed by the Superintendent.
Whenever possible, the building lateral shall
be brought to the building at an elevation below the basement floor.
Building laterals laid parallel to a bearing wall shall not be installed
closer than three feet to such wall. The building lateral shall be
laid at uniform grade and in straight alignment insofar as possible.
Changes in direction shall be made only with properly curved pipe
and fittings. Changes of direction of 90° or greater shall be
made with a cleanout which extends to grade, terminating in a terminal
box set in concrete. The ends of all building or street laterals,
which are not connected to the interior plumbing of the building,
for any reason, shall be sealed against infiltration by a suitable
stopper, plug, or by other approved means.
In all buildings in which any building drain
is too low to permit gravity flow to the public sewer, wastewater
carried by such drain shall be lifted by mechanical means and discharged
to the building lateral on approval of the City Engineer.
All excavations required for the installation
of a building or street lateral shall be open trench work. Pipe laying
and backfilling, regardless of pipe material used, shall be performed
in general accordance with paragraphs 3 through 6 of ASTM Specification
C-12, except that trench width, measured at the top of the installed
pipe, shall not exceed the outside pipe diameter plus 14 inches and,
except that no backfill shall be placed until the work has been inspected.
The depth of cover over the pipe shall be sufficient to afford protection
from frost, but in no case shall such depth be less than four feet.
All joints and connections shall be made watertight.
A. Cast iron pipe poured joints. Poured joints for cast
iron pipe shall be firmly packed with oakum or hemp, and the annulus
filled with an approved compound not less than one inch deep. The
said compound shall be run in with a single pouring, and caulked tight,
if appropriate for the compound used. No paint, varnish, or other
coatings shall be permitted on the jointing material until after the
joint has been tested and approved. The transition joint between cast
iron pipe and other pipe materials shall be made with special adapters
and jointing materials approved by the City Engineer. If such joints
are hot-poured, the material shall not soften sufficiently to destroy
the effectiveness of the joint when subjected to a temperature of
160° F., nor be soluble in any of the wastes carried by the lateral.
B. Cast iron push joints. Premolded gaskets may be used
for hub and plain end cast iron pipe joints and joints with fittings
if approved by the City Engineer. The gasket shall be a neoprene compression-type
unit which provides a positive seal in the assembled joint. The gasket
shall be a premolded, one-piece unit, designed for joining the cast
iron hub and plain end soil pipe and fittings. The assembled joint
shall be sealed by compression of the gasket between the exterior
surface of the spigot and the interior surface of the hub. The joint
shall be assembled following the manufacturer's recommendations using
acceptable lubricant and special pipe-coupling tools designed for
that purpose. The plain spigot end shall be forced into the hub end
of the pipe for the full depth of the hub itself. Lubricant shall
be a bland, flax-base, nontoxic material, and shall not chemically
attack the gasket material.
C. PVC push joints. Joints for PVC sewer pipe shall follow the manufacturer's recommendations, using properly designed couplings and rubber gaskets pursuant to the published information relating thereto, and conforming to the applicable ASTM specification identified in §
456-20.
The street lateral, building lateral, or the
combined lateral shall be tested for infiltration/exfiltration by
A. Any full pipe method described in §
456-48; or
B. By a suitable joint method, with the prior written
approval of the City Engineer.
The applicant for the building lateral permit shall notify the Superintendent when the building lateral is ready for inspection and connection to the street lateral is to be made. The connection shall be made under the supervision of the Superintendent. When street laterals are installed pursuant to §
456-42, the property owner, builder, or developer shall notify the Superintendent when the street lateral is ready for inspection and connection to the main sewer, and such connection shall be made under the supervision of the Superintendent.
When trenches are excavated for the laying of building lateral pipes or for laying of street lateral pipes pursuant to §
456-42, such trenches shall be inspected by the Superintendent. Before the trenches are backfilled, the person performing such work shall notify the Superintendent when the laying of the building lateral is completed, and no backfilling of trenches shall begin until approval is obtained from the Superintendent.
All excavations for constructing building laterals shall be adequately protected with barricades and lights so as to protect the public from hazard. Streets, sidewalks, parkways, and other public property disturbed, in the course of the work, shall be restored in a manner satisfactory to the City. When installation requires disturbance of paved public roads and shoulders, restoration shall involve backfilling to road grade. Shortly thereafter the Department of Public Works (DPW) shall complete road and shoulder restoration to the City's standards. The cost for such final road and shoulder restoration by the DPW shall be included with the fees paid with the application for the permit required in §
456-17.
An interior cleanout fitting shall be provided
for each building lateral at a readily accessible location, preferably
just inside the basement wall. The fitting shall contain a forty-five-degree
branch with removable plug or test tee, and so positioned that sewer
cleaning equipment can be inserted therein to clean the building lateral.
The cleanout diameter shall be no less than the building lateral diameter.
All costs associated with the provisions of
this article shall be borne by the property owner unless specifically
stated or agreed to be a cost borne by the City. The property owner
shall indemnify the City from any loss or damage that may be directly
or indirectly occasioned by the installation of the building and street
laterals, and connections and appurtenances.