Unless a larger size is required in pursuance
of this Part 2, no building sewer shall be less than four inches in
diameter.
All building sewers and service laterals shall
be constructed by use of one of the following types of pipe:
A.Â
Service weight (SV) cast iron soil pipe at least four
inches in internal diameter conforming to "Cast Iron Soil Pipe and
Fitting," ASTM A-74-69, latest revision.
B.Â
Polyvinylchloride (PVC) pipe at least four inches
in internal diameter gasket type conforming to ASTM D-3034-74SDR35
or equal or Schedule 80 PVC, using solvent cement. The rubber rings
to comply with ASTM D-3212.
C.Â
Jointing materials for the various types of pipe shall
be as follows:
(1)Â
Cast iron pipe shall have push-on joints consisting
of rubber gaskets conforming to the requirements of "Rubber Gaskets
for Cast Iron Soil Pipe," ASTM 564-74.
(2)Â
Polyvinylchloride (PVC), four-inch and six-inch pipe
shall be joined with separate fluid-tite twin gasket couplings. Each
coupling shall consist of a body of extruded stock, internally machined
and furnished with two rubber gaskets. Eight-inch diameter and larger
diameter pipe shall be joined with bell and spigot type of rubber
gasketed joint. Each joint shall consist of a formed bell complete
with a single rubber gasket. All fittings shall utilize rubber gasket
joints. Rubber gaskets shall comply with the requirements specified
in ASTM D-1869, C-361 or C-443.
Uniform bedding shall be provided along the
entire length of a building sewer, and all joints of a building sewer
shall be watertight and rustproof. No cement mortar joints shall be
used.
A.Â
Trenches (both earth and rock trenches). "First Class
Bedding" shall be provided as a foundation for all pipe. The bedding
material shall consist of crushed stone conforming to the Commonwealth
of Pennsylvania Department of Transportation grading and quality requirements
for No. 2B coarse aggregate. The crushed stone shall be placed in
the bottom of the trench within six inches of the bottom of pipe,
minimum depth of six inches over the pipe.
B.Â
Concrete joints shall be used when tieing new pipe
to existing pipe. Proper adopting fittings (i.e., Johns-Manville Duplex
couplings for AC to pipe of other material) along with concrete encasement.
Where a building or buildings on an improved property, at the time of securing a permit under § 154-17 to connect to a sewer, shall be served by its own sewage disposal system, device, or other form of private sewage disposal, and where such building or buildings are required, pursuant to this Part 2, to be connected to a collection sewer, the existing house sewer or building sewer shall be broken on the structure side of such existing sewage disposal system or device and an attachment shall be made, with proper fittings, to continue such house or building sewer line, as a building sewer undiminished in inside diameter, but not less than four inches, to the service lateral.
A building sewer which serves one improved property
may occupy the same trench as a building sewer to serve the next adjoining
improved property; and provided that such joint occupancy is by mutual
agreement of the owners concerned.
It shall be the duty of every person constructing
or owning any building sewer, house drain, soil pipe, waste pipe,
vent pipe, plumbing fixtures, or any other passage or connection between
a sewer and any grounds, buildings, erections, and in like manner
it shall be the duty of the owners of all grounds, buildings, erections,
and all parties interested therein or thereof, to cause and require
that such building sewer, house drain, soil pipe, waste pipe, vent
pipe, plumbing fixtures and every other passage or connection shall
be adequate for its purpose, and at all times allow to pass freely
all material that enters or should enter the same.
In order to change, alter or modify any building
sewer, house drain, service lateral, vent pipe, waste pipe, soil pipe,
plumbing fixtures or any other sewer passage or connection, written
notice of such must be served on the Authority which must give its
written approval before any changes, alterations or modifications
shall be made.
Fittings in a building sewer shall conform to
the type of pipe used in construction of such sewer.
Change in direction in a building sewer must
be made by use of "Y" branches or of 1/8, 1/16, 11Â 1/4 or 1/6
bends.
Fittings or connections in a building sewer
which have an enlargement, chamber or recess with a ledge, shoulder
reduction of pipe area that shall offer any obstruction to flow, shall
not be allowed.
A.Â
Lead joints in cast iron soil pipe in a building sewer shall be packed with oakum in the bell and spigot terminations and thereafter shall be filled with molten lead to a depth of at least one inch for pipes four-inch and six-inch diameter pipe and 1.25 inches for eight-inch and twelve-inch diameter pipe and not to be depressed more than 1/8 inch below the rim of the hub. The lead then must be caulked in place. No paint, varnish or other coating shall be permitted on the jointing material until after the building sewer has been tested and approved as provided in §§ 154-44 and 154-45.
B.Â
Material for hot-poured joints shall not soften sufficiently
to destroy the effectiveness of the joint when subjected to a temperature
of 160º F., 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.
A.Â
Floor drains shall be permitted to be connected to
the Building Sewer only where it can be shown to the satisfaction
of the Township that their connection is absolutely necessary. Where
such drains are permitted, arrangements shall be made to maintain
a permanent water-seal in the traps, and such drains shall be provided
with check or backwater valves where warranted.
B.Â
A permit shall be obtained from the Authority before
any floor drain may be attached to the house drain.
C.Â
No permit for a basement floor drain shall be granted
until the owner of the building or his agent has executed, signed
and filed a written agreement upon a form furnished by the Township
releasing the Township from any damage that may result from the basement
being flooded by the stoppage of sewers.
D.Â
Sump pumps shall not be connected to, nor the discharge
therefrom flow into, any drain pipe which is connected to a building
sewer.
A.Â
Cleanouts shall be provided in each building sewer
at maximum intervals of 75 feet and each change of direction to permit
rodding with an auger or tape. Cleanouts shall be constructed by using
a "T" or "Y" fitting in the run of pipe with a forty-five-degree bend
and riser to the ground surface. The cast iron riser pipes shall be
provided with brass screw plug. PVC riser pipes may use brass or PVC
screw plug. Risers shall be at a level equal to the finished grade
level.
B.Â
Refer to the Typical Building Sewer Sheet, Sketch
Number 213A.[1]
[1]
Editor's Note: Said sketch is included at the end of this chapter.
A.Â
A building sewer shall be provided with horizontal single vented trap, known as an interceptor trap, of not less than four inches inside diameter. The trap shall be provided with a cast iron mushroom vent. The trap shall be cast iron or polyvinylchloride (PVC). Fabricated PVC traps shall be as shown on Sketch 213A or as may be approved by the Authorities Engineer. All materials shall comply with § 154-28.
B.Â
The vented trap shall be constructed at the lower
end of the building sewer. The 10 feet dimension shown on the sketch
is approximate and may be revised according to conditions encountered
in the field. Where the distance from the main sewer to the building
is less than 75 feet, the vented trap may be used as the cleanout
in lieu of the cleanout located approximately 10 feet from the building
as shown on Sketch 213A.
The interceptor trap described under § 154-40 shall be located at a point to be determined and approved by the Authority and in accordance with rules and regulations applicable thereto as adopted by Authority. Such trap and its vent shall be on the property side of the curbline or right-of-way line.
Wherever in the opinion of the Authority the
trenching conditions require either a specific type of pipe, jointing
material or encasement in concrete, such materials as it may direct
shall be installed to protect the property owner and/or the Township
for special conditions as follows:
A.Â
Where the trench is less than four feet deep in a
traveled roadway, special bedding, consisting of crushed stone or
concrete cradle, as directed by the Township shall be used.
B.Â
Service laterals and building sewer for all service
stations, garages, or other establishments storing, using, or dispensing
gasoline, kerosene, benzine, naphtha, fuel oil or other flammable
or explosive liquid, solid or gas, or similar solvents shall be constructed
of cast iron pipe with leaded joints.
C.Â
Where lines are laid in fill or within 18 inches of
potable water lines, cast iron soil pipe with caulked and lead gasket
joints shall be used.
D.Â
Where water, excessive amounts of wet backfill or
marshy ground exists the use of cast iron pipe will be required.
E.Â
Where foundation conditions are poor due to ground
water, or subsurface materials, the building sewer shall be laid on
a base of Pennsylvania Department of Transportation No. 2B crushed
stone at least six inches in depth.
F.Â
Backfilling of pipe trenches on Township roads and
right-of-ways shall be made with loose earth, free of rock and stones,
and carefully tamped about and over the pipe in six-inch layer for
a depth of two feet above the pipe, when coarser materials may be
backfilled and the trench brought to its original condition. Backfilling
of pipe trenches on state roads and right-of-way shall conform to
the Pennsylvania Department of Transportation Specifications, Form
408-1970 and Form 945B REV.
The slope or grade of a building sewer shall
be no less than 1/4 inch per foot of length and shall be sloped downward
in the direction of flow. If elevations are such that the connection
cannot be made at 1/4 inch per foot the Municipal Authority may grant
permission to install the line at some gradient less than 1/4 inch
per foot but in no case less than 1/8 inch per foot.
A.Â
The Authority or the consulting engineer shall observe
all testing of a building sewer. All equipment and material required
for testing shall be furnished by the owner of the improved property
to be connected to a sewer.
B.Â
In the event a building sewer is not approved by the
Authority further test or tests shall be made following completion
of necessary corrections. A fee as set from time to time by resolution
of the Board of Supervisors or the Authority will be charged by the
Authority for observation of each test subsequent to the initial test.
[Amended 11-21-2000 by Ord. No. 132-2000]
No building sewer shall be covered until it has been inspected, tested, as provided in § 154-44, and approved. If any part of a building sewer is covered before being inspected, tested and accepted, it shall be uncovered for inspection and testing at the cost and expense of the owner of the improved property.
Every building sewer of any improved property
shall be maintained in a sanitary and safe operating condition by
the owner.
Every excavation for a building sewer or service
lateral shall be guarded adequately with barricades and lights to
protect all persons from damage and injury. Streets, sidewalks and
other public property disturbed in the course of installation of a
building sewer or service lateral shall be restored, at the cost and
expense of the owner of the improved property being connected, in
a manner satisfactory to the Township.
Wherever the surface of any public street, sidewalk
or cartway is disturbed by construction of the service laterals, the
surfacing material must be restored in kind and maintained to the
satisfaction of the Authority and Township. Any and all construction
in a public street of the Township shall be in compliance with the
ordinances of the Township and any and all construction in a state
highway shall be in compliance with Pennsylvania Department of Transportation
requirements and specifications. All permits shall be obtained before
construction is commenced, including the permits required for opening,
or disturbing the surface of streets controlled by the Township and
state. All Pennsylvania Department of Transportation permits will
be obtained by the Township. All permits issued for construction will
require that streets or roads under construction remain passable for
vehicular traffic during the period of construction.
The construction of service laterals and building sewers shall at all times, be subject to supervision and inspection by the Authority or its representative and shall conform to the Authority specifications. The service laterals and building sewer shall not be covered until permitted by the Authority and all backfilling or trenches shall be under its supervision and shall be compacted according to § 154-42.
Connections with sewers where same are run through
private property shall in all respects be governed by this Part 2.
A.Â
In all cases where collection sewers are not available
either in the street or in easements accessible to any property for
which subdivision is requested or intended, the developer shall be
responsible to install collection sewers, sewer service laterals,
and building sewers to connect with each dwelling unit, but such sewers
shall be capped at the appropriate points (which is designated and
approved by Authority) until the Authority sewers become available.
In such event the owner shall install on-site disposal units or an
on-site temporary treatment facility, in each case, in accordance
with the regulations of the Chester County Health Department.
B.Â
All capped sewers shall be designed, installed, accepted
and dedicated to the Authority in accordance with this Part 2.
A.Â
Old building sewers may be used in connection with
new buildings only when they are found, on examination and test by
the Authority, to meet all requirements of this Part 2.
B.Â
All asphalt-paper pipe, such as Orangeburg, shall
be replaced with pipe material used for making the lateral connection
except in unusual conditions permitted by the Authority's engineer.
No building sewer 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.
In all buildings in which any building drain
is too low to permit gravity flow to the collection sewer, sanitary
sewage carried by such drain shall be lifted by artificial means approved
by the Authority and discharged to the building sewer.
All excavations required for the installation
of a building sewer shall be open trench work unless otherwise approved
by the Authority in writing.
A.Â
Every building sewer shall be tested by filling the
same with water, completely, so that every section shall be tested
with not less than a ten-foot head of water. Water shall be kept in
the building sewer for 15 minutes before inspection starts and no
leakage shall be observable at the time of inspection.
B.Â
Upon approval of the test of a building sewer by the
Authority, a certificate of approval will be issued to the owner of
the improved property.
C.Â
The applicant for the building sewer connection permit
shall notify the Authority when the building sewer is ready for inspection
and connection to the public sewer. The removal of the stopper in
or tapping of the public sewer shall be made under the supervision
of the Authority or its representatives.
D.Â
Air testing.
(1)Â
Low pressure air testing of building sewers may be
used as an alternative for water exfiltration tests. All building
sewer connection pipes shall be tested whether the line is under water
or not.
(2)Â
The test section of the building sewer shall be plugged
at each end. One of the plugs used must be tapped and equipped for
the air inlet connection for filling the line from the air compressor.
All pipe outlets shall be properly capped or plugged, and carefully
braced against the internal pressure to prevent air leakage by slippage
and blowout.
(3)Â
The air control equipment shall have a monitoring
pressure gage having a pressure range from zero to 15 psi. The gage
shall have minimum divisions of 0.10 psi and an accuracy of pms0.5
psi. The air control equipment shall be Cherne Air-Loc equipment as
manufactured by Cherne Industrial of Hopkins, Minnesota, or approved
equal.
(4)Â
If the time, in minutes and seconds, for the air pressure
to drop from 3.5 to 2.5 psig is less than that shown in the table
below for the designated pipe size, the section of the pipe undergoing
the test shall not have passed the test; therefore, adequate repairs
must be made and the line restored.
(5)Â
As a safety precaution, all pneumatic plugs shall
be seal tested before being used in the actual test installations.
|
Time Requirements for Air Testing
| ||
|---|---|---|
|
Pipe Size
(inches)
|
Time
(minutes)
| |
|
4
|
2.0
| |
|
6
|
3.0
| |
|
8
|
4.0
| |
|
10
|
5.0
| |
(6)Â
Adjustment and procedures for making air pressure
correction for groundwater. An air pressure correction is required
when the prevailing ground water is above the sewer line being tested.
Under this condition, the air pressure must be increased 0.433 psi
for each foot the groundwater level is above the invert of the pipe.
In the event of the demolition of any building,
the owner of the building shall be responsible for plugging the existing
building sanitary sewer connection at the property line. Any reuse
of such connection shall require a building sewer connection permit
and connection fee.
No service lateral shall be constructed, laid
and connected except in a manner and type approved by the Authority
which shall supervise and control the construction of the same.
