The installation standards contained herein
shall not require the removal, alteration or abandonment of nor prevent
continued use of an existing building sewer connected to a public
sewer; this provision shall not relieve the responsibility of compliance
with the functional standards of this chapter.
No person shall uncover, make any connections
with or opening into, use, alter or disturb any public sewer or appurtenance
thereof without first obtaining a permit from the Director. The Director
may impose reasonable conditions for granting a permit which are consistent
with Board policies and which may relate to the efficient operation
of the sewage works.
All costs and expenses incident to the installation
and connection of the building sewer shall be borne by the owner(s).
The owner(s) shall indemnify the town from any loss or damage that
may directly or indirectly be caused by the installation of the building
sewer.
A separate and independent building sewer shall
be provided for every building, except where a special exemption is
granted. The Director may direct the disposal of sewage from the two
or more buildings to the public sewer through a single building sewer
where the Director has determined that such a joint connection will
more effectively serve a parcel and protect town facilities and will
not be detrimental to the properties to be served or the wastewater
facilities. The town does not and will not assume any obligation or
responsibility for damage caused by or resulting from any such joint
connection aforementioned.
Existing building sewers may be used in connection
with new buildings only when they are found, on examination and testing
by the Director or his authorized representative, to meet all requirements
of this chapter. Existing building sewers which have connected buildings
to private wastewater disposal facilities may be broken and extended
to the public sewer when they are found, on examination and test by
the Director or his authorized representative, to meet all requirements
of this chapter.
All building sewers and drains shall conform
to the following requirements:
A.
Building drains and fittings shall be bituminous coated,
inside and out, cast iron soil pipe conforming to ASTM Specification
A 74. The inside diameter shall be not less than four inches. Joints
shall be as specified in the State Fire Prevention and Building Code.
B.
Gravity building sewers and fittings shall be either
bituminous coated, inside and out, cast-iron soil pipe conforming
to ASTM Specification A 74 or polyvinyl chloride (PVC) pipe conforming
to ASTM Specification D 3034 with elastomeric joints in compliance
with ASTM Specification D 3212. The standard dimension ratio for PVC
pipe and fittings shall be no greater than 35. The inside diameter
of gravity building sewers shall be at least four inches but not less
than the size of the discharging upstream pipe.
C.
Pressure building sewers shall be PVC pipe conforming
to ASTM Specification D 2241. The standard dimension ratio shall be
no greater than 26. Joints shall be rubber-gasketed type meeting the
requirements of ASTM Specification D 3139. Fittings shall be either
PVC or cast iron. PVC fittings shall be pressure rated. Cast-iron
fittings shall conform to AWWA Specification C 110. Pressure sewers
handling discharges from grinder pumps shall be not less than 1 1/2
inches in size. Pressure sewers handling discharges from other type
pumps shall be not less than four inches in size.
D.
Joints for pipes, fittings and connections shall be
gastight and watertight. Concrete or mortar joints shall not be permitted.
Transition joints between cast-iron and PVC pipe shall be made with
special adapters approved by the Director.
E.
Gravity building sewers shall be sloped uniformally
at a slope of at least 1/4 inch per foot, unless the Director determines
that such grade cannot be attained. In such an event, the sewer slope
may be reduced to 1/8 inch per foot. Grades of less than 1/8 inch
per foot shall not be permitted under any circumstances.
F.
Gravity building sewers shall, to the extent possible,
be laid at a uniform grade and in a straight horizontal alignment.
Fittings shall be used to make changes in alignment and grade. Sweeping
curves shall not be permitted.
G.
Building sewers shall have sufficient earth cover
to prevent freezing of the pipe and contents. Cover for gravity sewers
shall be not less than three feet. Cover for pressure sewers shall
be not less than four feet.
H.
Wherever possible, the building drain shall, at its
point of terminus, be three feet below the elevation of the basement
floor.
I.
A cleanout shall be installed on the building drain
near its junction with the building sewer or immediately inside the
building. Cleanouts shall be installed on gravity sewers wherever
the change in direction or grade exceeds 45°. The distance between
cleanouts shall not exceed 100 feet. All cleanouts shall extend above
grade and be equipped with a watertight cap. Cleanouts shall not be
located, to the extent possible, in paved areas. Cleanouts shall not
be located within public travelways, whether paved or not.
J.
All building sewers shall be installed using open-trench
methods of construction, unless otherwise approved by the Director.
Pipelaying and backfilling shall be performed in accordance with ASTM
Specification D 2321, except that pipe bedding material shall be installed
to a depth of six inches below the pipe and to six inches above the
crown of the pipe. Pipe bedding material shall be No. 1 size clean
crushed gravel or stone. The pipe shall not be backfilled until inspected
and approved by the Director. Backfilling to grade shall use suitable
material previously excavated except within public rights-of-ways
where the Street Superintendent shall define the backfill material
and the compaction effort required.
K.
Building sewer connections to the sanitary sewers
shall be accomplished using a special saddle or other approved connection
piece that provides a watertight connection. The connection shall
be made at 45° off of the vertical in the upper half of the pipe.
Holes cut into existing sanitary sewers shall be as small as possible.
All rough edges shall be removed. The building sewer shall not protrude
into the sanitary sewer under any circumstances.
L.
When the building sewer is installed prior to installation
of the building drain, the end shall be capped with a watertight plug.
Every building owner shall maintain each plumbing
fixture, pipe, drain, sewer and sewer connection of such building
in a sanitary condition and shall remove stoppages, repair leaks and
replace broken worn or faulty fixtures or pipes which shall be the
cause of any unsanitary condition.
Whenever possible, the building sewer shall
be brought to the building at an elevation below the basement floor.
In all buildings in which any building drain is too low to permit
gravity flow to the public sewer, sanitary sewage carried by such
building drain shall be lifted by an approved means and discharged
to the building sewer.
A.
The plumbing systems of buildings connecting to public
sewers shall be in conformance with the State Plumbing Code and, if
applicable, local health and plumbing codes.
B.
Building traps which prevent ventilation of the sewer
through the building vents shall not be permitted, unless such traps
were in use prior to the date of this chapter.
No person(s) shall make connection of roof downspouts,
foundation drains, areaway drains or other sources of surface runoff
or groundwater to a building sewer or building drain which in turn
is connected directly or indirectly to a public sanitary sewer.
A.
All building sewers shall be connected into the public
sewer at the location of the lateral connection which has been identified
by the Director. The method of connection to any public sanitary sewer
shall be approved by the Director prior to installation.
B.
All building sewers connected to a public sanitary
sewer shall be made by a qualified plumber or sanitary sewer contractor,
approved by the Director.
The applicant for the building sewer permit
shall notify the Director when the building sewer is ready for inspection
and connection to the public sewer. The connection and testing shall
be made under the supervision of the Director or his representative.
Test pressure shall be equal to at least a ten-foot column of water
at all points in the pipeline. The building sewer shall hold this
water for a period of 30 minutes without showing a drop greater than
two inches in the water level. If the building sewer fails the test,
defective joints, pipes or fittings shall be located and replaced
or repaired. Additional tests and repairs shall be made until the
pipeline passes the test.
A.
When trenches are opened for the laying of building sewer pipes, such installations shall be inspected by the Director before the pipes are covered. The covering of a pipe before inspection is made will subject the person to whom a permit is issued to penalties under Article XII of this chapter, and the installation will not be approved for use until it is uncovered and inspected by the Director.
B.
The owner shall also indemnify the town from any loss
or damage that may directly or indirectly be caused by the installation
of the building sewer.
All excavations for building sewer installation
shall be adequately guarded 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 Director and any other agency or municipality
having jurisdiction over such property.
When any building sewer is to serve a school,
hospital or similar institution or public building or is to serve
a complex of industrial or commercial buildings or which, in the opinion
of the Director, will receive sewage or industrial wastes of such
volume or character that frequent maintenance of said building sewer
is anticipated or sampling of wastewater is needed to monitor the
discharge and protect the sewage works, then such building sewer shall
be connected to the public sanitary sewer by the owner through a manhole
designed as required by the Director. The Director shall determine
if and where this type of connection to the public sanitary sewer
is required. Connections to existing manholes shall be made as directed
by the Director. If required, a new manhole shall be installed in
the public sanitary sewer and the building sewer connection made thereto
by the owner as instructed by the Director.
