Text/014.txt

CHAPTER 10
TRAPS, INTERCEPTORS AND SEPARATORS
SECTION PC 1001
GENERAL
1001.1 Scope. 
This chapter shall govern the material and installation of traps, interceptors and separators.
SECTION PC 1002
TRAP REQUIREMENTS
1002.1 Fixture traps. 
Each plumbing fixture shall be separately trapped by a 
liquid
-
seal
trap, except as otherwise 
permitted by this code. The vertical distance from the fixture outlet to the trap weir shall not exceed 48 inches (1220 
mm), and the horizontal distance shall not 
exceed 30 inches (
762
mm) measured from the centerline of the fixture 
outlet to the centerline of the inlet of the trap. The height of a clothes washer standpipe above a trap shall conform to 
Section 802.3.3. A fixture shall not be double trapped.
Exceptio
ns:
1.
This section shall not apply to fixtures with integral traps.
2.
A combination plumbing fixture is permitted to be installed on one trap, provided that one compartment is 
not more than 6 inches (152 mm) deeper than the other compartment and the wast
e outlets are not more than 
30 inches (762 mm) apart.
3.
A grease interceptor intended to serve as a fixture trap in accordance with the manufacturer’s installation 
instructions shall be permitted to serve as the trap for a single fixture or a combination 
sink of not more than 
three compartments where the vertical distance from the fixture outlet to the inlet of the interceptor does not 
exceed 30 inches (762 mm
)
and the developed length
of the waste pipe from the most upstream fixture outlet 
to the inlet of
the interceptor does not exceed 60 inches (1524 mm).
4.
Floor drains in multilevel parking structures that discharge to a building storm sewer shall not be required to 
be individually trapped. Where floor drains in multilevel parking structures are requir
ed to discharge to a 
combined building sewer system, the floor drains shall not be required to be individually trapped provided 
that they are connected to a main trap in accordance with Section 1103.1.
5.
This section shall not apply to outdoor drinking fo
untains discharging to a drywell.
6.
This section shall not apply where local acid neutralizing systems are utilized in accordance with the rules of 
the Department of Environmental Protection and Section 803.2 of this code.
1002.2 Design of traps. 
Fixture 
traps shall be self
-
scouring. Fixture traps shall not have interior partitions, except 
where such traps are integral with the fixture or where such traps are constructed of an approved material that is 
resistant to corrosion and degradation. Slip joints sh
all be made with an approved elastomeric gasket and shall be 
installed only on the trap inlet, trap outlet and within the trap seal.
1002.3 Prohibited traps. 
The following types of traps are prohibited:
1.
Traps that depend on moving parts to maintain the 
seal.
2.
Bell
, pot, bottle
traps
and traps with interior partitions
.
3.
Crown
-
vented traps.
4.
Traps not integral with a fixture and that depend on interior partitions for the seal, except those traps constructed 
of an approved
material that is resistant t
o corrosion and degradation.
5.
“S” traps.
6.
Drum traps.
TRAPS, INTERCEPTORS AND SEPARATORS
Exception: 
Drum traps
used as solids interceptors and drum traps serving chemical waste systems shall be permit-
ted.
1002.4 Trap seals. 
Each fixture trap shall have a liquid seal of not less than 2 i
nches (51 mm) and not more than 4 
inches (102 mm), or deeper for special designs relating to accessible 
fixtures. 
1002.4.1 Trap seal protection. 
Trap seals of emergency floor drain traps and trap seals subject to evaporation shall 
be protected by one of t
he methods in Sections 1002.4.1.1 through 1002.4.1.3.
1002.4.1.1 Potable water
-
supplied trap seal primer valve. 
A potable water
-
supplied trap seal primer valve 
shall supply water to the trap. Water
-
supplied trap seal primer valves shall conform to ASSE 101
8. The dis-
charge pipe from the trap seal primer valve shall connect to the trap above the trap seal on the inlet side of the 
trap.
1002.4.1.2 Reclaimed or gray water
-
supplied trap seal primer valve. 
A reclaimed or gray water
-
supplied 
trap seal primer valve
shall supply water to the trap. Water
-
supplied trap seal primer valves shall conform to 
ASSE 1018. The quality of reclaimed or gray water supplied to trap seal primer valves shall be in accordance 
with the requirements of the manufacturer of the trap seal
primer valve and this code. The discharge pipe from 
the trap seal primer valve shall connect to the trap above the trap seal, on the inlet side of the trap.
1002.4.1.3 Manual water
-
supplied trap priming. 
A hose bib or similar manually operated 
plumbing fixture 
shall be provided within the same room and within a horizontal distance not to exceed 25 feet (7620 mm) and 
not more than 3 feet (914 mm) above the floor.
1002.5 Size of fixture traps. 
Fixture trap size shall be sufficient to drain the fix
ture rapidly and not less than the size 
indicated in Table 709.1. A trap shall not be larger than the drainage pipe into which the trap discharges.
1002.6 Building traps.
Building (house) traps shall be installed on all building drains near the 
foundation wall of the 
structure, inside of the street line, and on the sewer side of all connections except the connection used to receive the 
discharge from a sewage ejector, oil separator or leader on combined systems. If such trap is placed outside of 
the 
foundation wall or below a cellar floor, it shall be made accessible in a manhole with a cover, or by extension of the 
two handholes that shall be provided with cleanouts at the cellar floor or grade. Handhold extensions shall be not more 
than 18 inche
s (457 mm) above the centerline of the drain. Building (house) traps shall be the same size as the building 
drain connected thereto and shall be provided with
a fresh air inlet in accordance with Section 703.7.1.
1002.7 Trap setting and protection. 
Traps s
hall be set level with respect to the trap seal and, where necessary, shall 
be protected from freezing.
1002.8 Recess for trap connection. 
A recess provided for connection of the underground trap, such as one serving a 
bathtub in slab
-
type construction, sh
all have sides and a bottom of corrosion
-
resistant, insect
-
and 
vermin
-
proof
con-
struction.
1002.9 Acid
-
resisting traps. 
Where a vitrified clay or other brittleware, acid
-
resisting trap is installed underground, 
such trap shall be embedded in concrete exten
ding 6 inches (152 mm) beyond the bottom and sides of the trap.
1002.10 Plumbing in mental health centers. 
In mental health centers, pipes and traps shall not be exposed.
SECTION 
PC 
1003
INTERCEPTORS AND SEPARATORS
1003.1 Where required. 
Interceptors and s
eparators shall be provided to prevent the discharge of oil, grease, sand 
and other substances harmful or hazardous to the 
building drainage system, the 
public sewer, the private sewage 
system or the sewage treatment plant or processes.
1003.2 Approval. 
Th
e size, type and location of each interceptor and of each separator shall be designed and installed 
in accordance with the manufacturer’s instructions and the requirements of this section based on the anticipated con-
ditions of use. Wastes that do not requi
re treatment or separation shall not be discharged into any interceptor or sepa-
rator.
1003.3 Grease interceptors. 
Grease interceptors shall comply with the requirements of Sections 1003.3.1 through 
1003.3.6.
CHAPTER 10
TRAPS, INTERCEPTORS AND SEPARATORS
SECTION PC 1001
GENERAL
1001.1 Scope. 
This chapter shall govern the material and installation of traps, interceptors and separators.
SECTION PC 1002
TRAP REQUIREMENTS
1002.1 Fixture traps. 
Each plumbing fixture shall be separately trapped by a 
liquid
-
seal
trap, except as otherwise 
permitted by this code. The vertical distance from the fixture outlet to the trap weir shall not exceed 48 inches (1220 
mm), and the horizontal distance shall not 
exceed 30 inches (
762
mm) measured from the centerline of the fixture 
outlet to the centerline of the inlet of the trap. The height of a clothes washer standpipe above a trap shall conform to 
Section 802.3.3. A fixture shall not be double trapped.
Exceptio
ns:
1.
This section shall not apply to fixtures with integral traps.
2.
A combination plumbing fixture is permitted to be installed on one trap, provided that one compartment is 
not more than 6 inches (152 mm) deeper than the other compartment and the wast
e outlets are not more than 
30 inches (762 mm) apart.
3.
A grease interceptor intended to serve as a fixture trap in accordance with the manufacturer’s installation 
instructions shall be permitted to serve as the trap for a single fixture or a combination 
sink of not more than 
three compartments where the vertical distance from the fixture outlet to the inlet of the interceptor does not 
exceed 30 inches (762 mm
)
and the developed length
of the waste pipe from the most upstream fixture outlet 
to the inlet of
the interceptor does not exceed 60 inches (1524 mm).
4.
Floor drains in multilevel parking structures that discharge to a building storm sewer shall not be required to 
be individually trapped. Where floor drains in multilevel parking structures are requir
ed to discharge to a 
combined building sewer system, the floor drains shall not be required to be individually trapped provided 
that they are connected to a main trap in accordance with Section 1103.1.
5.
This section shall not apply to outdoor drinking fo
untains discharging to a drywell.
6.
This section shall not apply where local acid neutralizing systems are utilized in accordance with the rules of 
the Department of Environmental Protection and Section 803.2 of this code.
1002.2 Design of traps. 
Fixture 
traps shall be self
-
scouring. Fixture traps shall not have interior partitions, except 
where such traps are integral with the fixture or where such traps are constructed of an approved material that is 
resistant to corrosion and degradation. Slip joints sh
all be made with an approved elastomeric gasket and shall be 
installed only on the trap inlet, trap outlet and within the trap seal.
1002.3 Prohibited traps. 
The following types of traps are prohibited:
1.
Traps that depend on moving parts to maintain the 
seal.
2.
Bell
, pot, bottle
traps
and traps with interior partitions
.
3.
Crown
-
vented traps.
4.
Traps not integral with a fixture and that depend on interior partitions for the seal, except those traps constructed 
of an approved
material that is resistant t
o corrosion and degradation.
5.
“S” traps.
6.
Drum traps.
TRAPS, INTERCEPTORS AND SEPARATORS
Exception: 
Drum traps
used as solids interceptors and drum traps serving chemical waste systems shall be permit-
ted.
1002.4 Trap seals. 
Each fixture trap shall have a liquid seal of not less than 2 i
nches (51 mm) and not more than 4 
inches (102 mm), or deeper for special designs relating to accessible 
fixtures. 
1002.4.1 Trap seal protection. 
Trap seals of emergency floor drain traps and trap seals subject to evaporation shall 
be protected by one of t
he methods in Sections 1002.4.1.1 through 1002.4.1.3.
1002.4.1.1 Potable water
-
supplied trap seal primer valve. 
A potable water
-
supplied trap seal primer valve 
shall supply water to the trap. Water
-
supplied trap seal primer valves shall conform to ASSE 101
8. The dis-
charge pipe from the trap seal primer valve shall connect to the trap above the trap seal on the inlet side of the 
trap.
1002.4.1.2 Reclaimed or gray water
-
supplied trap seal primer valve. 
A reclaimed or gray water
-
supplied 
trap seal primer valve
shall supply water to the trap. Water
-
supplied trap seal primer valves shall conform to 
ASSE 1018. The quality of reclaimed or gray water supplied to trap seal primer valves shall be in accordance 
with the requirements of the manufacturer of the trap seal
primer valve and this code. The discharge pipe from 
the trap seal primer valve shall connect to the trap above the trap seal, on the inlet side of the trap.
1002.4.1.3 Manual water
-
supplied trap priming. 
A hose bib or similar manually operated 
plumbing fixture 
shall be provided within the same room and within a horizontal distance not to exceed 25 feet (7620 mm) and 
not more than 3 feet (914 mm) above the floor.
1002.5 Size of fixture traps. 
Fixture trap size shall be sufficient to drain the fix
ture rapidly and not less than the size 
indicated in Table 709.1. A trap shall not be larger than the drainage pipe into which the trap discharges.
1002.6 Building traps.
Building (house) traps shall be installed on all building drains near the 
foundation wall of the 
structure, inside of the street line, and on the sewer side of all connections except the connection used to receive the 
discharge from a sewage ejector, oil separator or leader on combined systems. If such trap is placed outside of 
the 
foundation wall or below a cellar floor, it shall be made accessible in a manhole with a cover, or by extension of the 
two handholes that shall be provided with cleanouts at the cellar floor or grade. Handhold extensions shall be not more 
than 18 inche
s (457 mm) above the centerline of the drain. Building (house) traps shall be the same size as the building 
drain connected thereto and shall be provided with
a fresh air inlet in accordance with Section 703.7.1.
1002.7 Trap setting and protection. 
Traps s
hall be set level with respect to the trap seal and, where necessary, shall 
be protected from freezing.
1002.8 Recess for trap connection. 
A recess provided for connection of the underground trap, such as one serving a 
bathtub in slab
-
type construction, sh
all have sides and a bottom of corrosion
-
resistant, insect
-
and 
vermin
-
proof
con-
struction.
1002.9 Acid
-
resisting traps. 
Where a vitrified clay or other brittleware, acid
-
resisting trap is installed underground, 
such trap shall be embedded in concrete exten
ding 6 inches (152 mm) beyond the bottom and sides of the trap.
1002.10 Plumbing in mental health centers. 
In mental health centers, pipes and traps shall not be exposed.
SECTION 
PC 
1003
INTERCEPTORS AND SEPARATORS
1003.1 Where required. 
Interceptors and s
eparators shall be provided to prevent the discharge of oil, grease, sand 
and other substances harmful or hazardous to the 
building drainage system, the 
public sewer, the private sewage 
system or the sewage treatment plant or processes.
1003.2 Approval. 
Th
e size, type and location of each interceptor and of each separator shall be designed and installed 
in accordance with the manufacturer’s instructions and the requirements of this section based on the anticipated con-
ditions of use. Wastes that do not requi
re treatment or separation shall not be discharged into any interceptor or sepa-
rator.
1003.3 Grease interceptors. 
Grease interceptors shall comply with the requirements of Sections 1003.3.1 through 
1003.3.6.
TRAPS, INTERCEPTORS AND SEPARATORS
1003.3.1 Grease interceptors and automatic greas
e removal devices required. 
A grease interceptor or auto-
matic grease removal device shall be required to receive the 
drainage
from fixtures and equipment with waste 
containing fats, oils, or grease located in food preparation areas and shall be in accordan
ce with the requirements 
of the Department of Environmental Protection. Grease interceptors and automatic grease removal devices shall 
receive waste only from fixtures and equipment that 
allow
fats, oils or grease to be discharged.
1003.3.2 Reserved. 
1003
.3.3 Grease interceptors and automatic grease removal devices not required. 
A grease interceptor or an 
automatic grease removal device shall not be required for individual dwelling units
, 
any private living quarters
, or 
non
-
culinary schools which only cont
ain residential type stoves and sinks intended for teaching basic home cook-
ing skills
.
1003.3.4 Grease interceptor and automatic
grease
removal device sizing and standards.
Grease interceptors 
and automatic grease removal devices shall be sized in accordance with 
the rules of the Department of Environ-
mental Protection
. Grease interceptors and automatic grease removal devices shall be designed and tested in ac-
cordance with 
PDI
G101, 
ASME A112.14.3
or
ASME 
A112
.14.4 and shall be installed in accordance with the 
manufacturer’s instructions. 
1003.3.4.1 Grease interceptor capacity. 
Grease interceptors shall have a grease retention capacity in accord-
ance with the rules of the Depar
tment of Environmental Protection.
1003.3.4.2 Rate of flow controls. 
Grease interceptors shall be equipped with devices to control the rate of water 
flow so that the water flow does not exceed the rated flow. The flow
-
control device shall be vented and ter
minate 
not less than 6 inches (152 mm) above the flood rim level or be installed in accordance with the manufacturer’s 
instructions.
1003.3.5 Automatic grease removal devices. 
Where automatic grease removal devices are installed, such devices 
shall be loca
ted downstream of each fixture or multiple fixtures in accordance with the manufacturer’s instructions. 
The automatic grease removal device shall be sized to pretreat the measured or calculated flows for all connected 
fixtures or equipment in accordance wi
th the sizing requirements of the Department of Environmental Protection. 
Ready access shall be provided for inspection and maintenance.
1003.3.6 Direct connection. 
The discharge piping from a grease interceptor shall be directly connected to the 
sanitary 
drainage system.
1003.4 Oil separators required. 
At repair garages where floor or trench drains are provided, car washing facilities
with engine or undercarriage cleaning capability, 
factories where oily and flammable liquid wastes are produced and 
hydraul
ic elevator pits, oil separators shall be installed into which oil
-
bearing, grease
-
bearing or flammable wastes 
shall be discharged before emptying 
into
the building drainage system or other point of disposal.
Exception: 
An oil separator is not required in 
hydraulic elevator pits where an 
automatic shut
-
down 
system is 
installed
for the prevention of accidental discharge of oil
-
laden waste water into the sanitary system
. Such systems 
shall not terminate the operation of pumps utilized to maintain emergency op
eration of the elevator by fire fighters.
1003.4.1 Separation of liquids. 
A mixture of treated or untreated light and heavy liquids with various specific 
gravities shall be separated in an approved receptacle.
1003.4.2 Oil separator design. 
Oil separators 
shall be listed and labeled, or designed in accordance with Sections 
1003.4.2.1 and 1003.4.2.2.
1003.4.2.1 General design requirements. 
Oil separators shall have a depth of not less than 2 feet (610 mm) 
below the invert of the discharge drain. The outlet o
pening of the separator shall have not less than an 
18
-
inch
(457 mm) water seal.
1003.4.2.2 Garages and service stations. 
Where automobiles are serviced, greased, repaired or washed or 
where gasoline is dispensed, oil separators shall have a capacity of no
t less than 6 cubic feet (0.168 m
3
) for the 
first 100 square feet (9.3 m
2
) of area to be drained, plus 1 cubic foot (0.028 m
3
) for each additional 100 square 
feet (9.3 m
2
) of area to be drained into the separator. Parking garages in which servicing, repair
ing or washing 
is not conducted, and in which gasoline is not dispensed, shall not require a separator. Areas of commercial 
garages utilized only for storage of automobiles are not required to be drained through a separator.
TRAPS, INTERCEPTORS AND SEPARATORS
1003.5 Sand interceptors in com
mercial establishments. 
Sand and similar interceptors for heavy solids shall be 
designed and located so as to be provided with ready access for cleaning, and shall have a water seal of not less than 
6 inches (152 mm).
1003.6 Clothes washer discharge interc
eptor.
Clothes washers shall discharge through an interceptor that is pro-
vided with a wire basket or similar device, removable for cleaning, that prevents passage into the drainage system of 
solids 
1
/
2
inch (12.7 mm) or larger in size, string, rags, 
buttons or other materials detrimental to the public sewage 
system.
Exceptions:
1.
Clothes washers in individual dwelling units shall not be required to discharge through an interceptor.
2.
A single clothes washer designed for use in individual dwelling un
its and installed in a location other than an 
individual dwelling unit shall not be required to discharge through an interceptor.
1003.7 Bottling establishments. 
Bottling plants shall discharge process wastes into an interceptor that will provide 
for 
the separation of broken glass or other solids before discharging waste into the drainage system.
1003.8 Slaughterhouses. 
Slaughtering room and dressing room drains shall be equipped with approved separators. 
The separator shall prevent the discharge into 
the drainage system of feathers, entrails and other materials that cause 
clogging.
1003.9 Venting of interceptors and separators. 
Interceptors and separators shall be designed so as not to become 
air bound
. 
Interceptors and separators shall be vented in ac
cordance with one of the methods in Chapter 9.
1003.10 Access and maintenance of interceptors and separators. 
Access shall be provided to each interceptor and 
separator for service and maintenance
, and for inspection by the department and the Department of
Environmental 
Protection
. Interceptors and separators shall be maintained by periodic removal of accumulated grease, scum, oil, or 
other floating substances and solids deposited in the interceptor or separator.
SECTION 
PC 
1004
MATERIALS, JOINTS AND CONNEC
TIONS
1004.1 General. 
The materials and methods utilized for the construction and installation of traps, interceptors and 
separators shall comply with this chapter and the applicable provisions of Chapters 4 and 7. The fittings shall not have 
ledges, shoul
ders or reductions capable of retarding or obstructing flow 
of
the piping.