No unauthorized person shall uncover, make any connections with or opening
into, use, alter or disturb any public sewer or appurtenances thereof without
first obtaining a written permit from the Superintendent or the Town Engineer.
There shall be a building sewer lateral connection permit required for
service connections made to the public sewer system. The owner or his agent
shall make application on the special forms furnished by the Town. The permit
application shall be supplemented by any plans, specifications or other information
considered pertinent in the judgment of the Superintendent.
All costs and expense incidental to the installation and connection
of the building sewer shall be borne by the owner. The owner or the person
installing the building sewer for said owner shall indemnify said Town from
any loss or damage that may directly or indirectly be occasioned by said installation.
The plumbing system of each building shall have a separate and independent
connection with the public sewer wherever possible. Where one building stands
in the rear of another on an interior lot and no connection to a sewer is
available or can be made through an adjoining alley, court, yard or driveway,
the building sanitary drain from the building on the front of the lot may
be extended to the building on the rear of the lot. This may be considered
as one building drain for permit and inspection purposes, but for sewer service
charge purposes, the number of connections shall be based upon the number
of dwelling units being operated.
Old building sewer laterals may be used in connection with new buildings
only when they are found, on examination and test by the inspector, to meet
all requirements of this Part 1.
A.
Building sewer lateral piping shall be not less than
four inches in diameter, and when four-inch- and five-inch-diameter pipe is
used, the average joint spacing shall not be less than five feet and should
have smooth internal joints.
B.
The minimum joint spacing shall not be less than two
feet for six-inch-diameter pipe or greater, and pipe unit lengths shall not
exceed 10 feet unless specifically authorized by the Town Engineer.
C.
The minimum crushing strength shall be as required for
the sizes following, as performed under the American Society for Testing Materials
three-edge bearing test, with the stipulation that there be no more than a
5% deflection in the inside diameter in a temperature range of 25° F.:
|
Use in Building Sewer Lateral
|
|
Pipe Diameter
(inches)
|
Crushing Strength
(pounds per foot)
| |
|---|---|---|
|
4, 5 and 6
|
1,100
| |
|
8 and 10
|
2,000
| |
|
12
|
2,250
| |
|
15 to 36
|
Shall meet public right-of-way test requirements
|
|
Use in Public Right-of-Way
| ||
|
Pipe Diameter
(inches)
|
Crushing Strength
(pounds per foot)
| |
|---|---|---|
|
4, 5, 6, 8 and 10
|
2,000
| |
|
12
|
2,250
| |
|
15
|
2,750
| |
|
18
|
3,300
| |
|
21
|
3,850
| |
|
24
|
4,400
| |
|
27
|
4,700
| |
|
30
|
5,000
| |
|
33
|
5,500
| |
|
36
|
6,000
|
D.
Every manufacturer submitting materials for acceptance
as an approved material shall show, in detail, the testing procedures and
resulting data obtained. The Town Engineer may require, at the manufacturer's
expense, physical tests to determine validity of any properties claimed by
the submitting manufacturer.
E.
All material submitted shall be "virgin" materials. The
manufacturer shall submit the chemical analysis of materials offered for acceptance
as an approved material. Physical tests such as hydrocarbon oil bath or acetic
acid time-immersion tests may be requested.
F.
Materials not meeting the requirements set forth herein
shall not be approved by the Town Engineer for installation as building sewer
lateral, nor shall approval be given by the Town Engineer for materials not
meeting the requirements set forth herein for sewer pipe installation in public
rights-of-way.
G.
The flow coefficient for sewer pipe shall be no larger
than n equals .013 (Manning formulation).
H.
The manufacturer shall provide instructions, written
or printed, on the installation or application of his product. These instructions
shall be on file with the Town Engineer. No verbal instructions will constitute
compliance with this requirement.
I.
Installation, whether by individuals or corporations,
shall comply with the manufacturer's recommendation. The said Inspector
or other designated official may request the manufacturer's representative
to define terms or requirements of the manufacturer's recommendation
in excess of the following minimum precautions.
J.
In laying pipe, the trench bottom irregularities shall
be brought up to grade with a compacted bearing of hand-selected soil or bank-run
sand or similar material fill or equivalent uniform bearing support. Said
material shall contain no stones over 3/4 of an inch in diameter. All pipe
shall be bedded or supported carefully so as not to ride on bells, hubs or
joints, and backfill over pipe and joints shall contain no stones over 3/4
of an inch in diameter to a point 12 inches above top of pipe.
K.
The ends of all building sewer laterals not immediately
connected with the building sanitary drain piping shall be securely closed
with a watertight stopper.
L.
No mechanical connection shall be made from building
sewer lateral to basement floor drains, roof drains, yard drains, sump pump
drains or any other source of surface or ground water.
M.
Any portion of building sewer lateral which shall cross
any existing or future public or private street shall not be less than six
inches in diameter and shall not have less than four inches of noncompressible
fill cover; if less than four inches of cover only can be provided, pipe shall
be encased with six inches of one-to-ten concrete. Backfill above pipe shall
be in accordance with requirements of the appropriate highway authorities.
N.
Inspection of building sewer laterals and location record
shall be made by said inspector before being covered over.
O.
Sewer pipe installations in the right-of-way shall be
inspected by the Town Engineer or other persons designated by the Town Board
before being covered over.
P.
All public sewer lines installed within the highway right-of-way
shall be installed within six feet of the line of said highway right-of-way,
except as otherwise approved by the Town Board of the Town of Boston.
The size and slope of the building sewer from the building drain to
the main public sewer shall be subject to the approval of the Superintendent,
Town Engineer or other person designated by the Town Board. In no case shall
the diameter of the building sewer lateral be less than six inches between
the building drain and the main public sewer if joints are less than five
feet average length. The slope of the pipe shall not be less than 1/4 inch
per foot unless lesser diameter smooth pipe is used. Proper reducer or increaser
fittings shall be used between all changes of pipe sizes and materials so
as to make a watertight and gastight joint in accordance with § 92-18
following.
Whenever possible, the building sewer shall be brought to the building
at an elevation below the basement floor. No building sewer lateral shall
be laid parallel to or within three feet of any bearing wall, which might
thereby be weakened. The depth shall be sufficient to afford protection from
frost. The building sewer shall be laid at a uniform grade and in straight
alignment insofar as possible. Changes in direction shall be made only with
properly curved pipes and fittings.
In all buildings in which any building sanitary drain is too low to
permit gravity flow to the public sewer, sewage carried by such drains shall
be lifted by approved artificial means and discharged into the building sewer
lateral at the owner's expense. No water-operated sewage ejector shall
be used. It shall be unlawful to connect cellar or basement floor drain, yard
drain or roof drain or foundation drain sump pump discharge to public sanitary
sewer. The main sanitary drain for any building may be installed hung below
the first floor or installed under the cellar floor. Laundry trays and washers
installed in cellars or basements shall have a gate valve in their waste lines.
All plumbing fixtures installed in cellars and basements shall be on a branch
line from the main sanitary drain and shall have a gate valve in this branch
line to prevent flooding in the event the public sanitary sewer becomes clogged.
Such gate valves shall be closed at all times except when the fixtures are
in use.
All excavations required for the installation of a building sewer lateral
shall be open trenchwork unless otherwise approved by the inspector. Pipe
laying and backfilling shall be performed in accordance with ASTM C12-58T
Specifications, except as modified in these rules and regulations. No backfill
shall be placed until the work as been inspected by the inspector or his representative.
Building sewer laterals and water service laterals or connections shall not
be laid in the same trench unless the water piping and connection is one foot
above the building sewer lateral and supported on an undisturbed earthen shelf.
All joints and connections shall be made gastight and watertight. Joints
in vitrified clay pipe shall be ASTM C425-60T. Between such pipe and other
types of pipe, joints shall be made with approved materials in accordance
with the latest plumbing requirements of the existing Building Code.[1] Cast-iron pipe joints shall be firmly packed with oakum or hemp
and filled with molten lead, Federal Specification QQ-L-156, not less than
one inch deep. Lead shall be run in one pouring and caulked tight. No paint,
varnish or other coatings shall be permitted on the jointing material until
after the joint has been tested and approved.
The connection of the building sewer into the public sewer shall use
the six-inch wye branch as installed in the public sewer if such wye branch
is available at a suitable location. If no wye branch is available at a suitable
location on the public sewer, then the owner shall install, at his own expense,
a six-inch wye branch in the public sewer at the location specified by the
Superintendent. In either case, the cost of installation of the building sewer
shall be at the sole expense of the owner. As an alternative, special fittings
such as saddle-hub tees may be used for the connection when approved by the
Superintendent or Inspector. In this case a neat hole may be cut in the public
sewer to receive the saddle-hub tee. The invert of the building sewer at the
point of connection shall be at the same or at a higher elevation than the
invert of the public sewer. A smooth, neat joint shall be made between the
saddle-hub tee and the main public sewer and the connection made secure and
watertight by encasement in concrete.
The applicant for the building sewer permit shall notify the Inspector
when the building sewer lateral is ready for inspection and connection to
the public sewer.
All excavations for a building sewer lateral installation shall be adequately
guarded with barricades and lights so as to protect the public from hazard.
Streets, sidewalks, parkways and other property disturbed in the course of
the work shall be restored in a manner satisfactory to the Town.
