Download Standard Specifications For Private Sewer Laterals

BUILDING SERVICES DEPARTMENT
250 Frank H. Ogawa Plaza, 2nd Floor, Oakland, CA 94612
Inspection Services: 510.238.3443 FAX: 510.238.2263
Standard Specifications
For Private Sewer Laterals
APPROVED MATERIALS LIST
City of Oakland 2012
Table of Contents
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Approved materials
Inspections
House sewer 4”-6”
Couplings
Bedding and Backfill
Guidelines for CSLM for VC pipe
ASTM C 12 Installing VC
ASTM D 2321 Installation of underground thermoplastic pipe
Main Sewer Taps
Standard cover for upper and lower laterals
GeoTexti1e Fabric
Reinforced Concrete utility boxes
Concrete Curing Compounds
Ready mix designs j
Main sewer Taps
Water and Sewer Separation
Sewer Overflow Devices and Backwater vavles
Cleanouts
Legislation for protected trees and Overflow prevention devices
1). APPROVED Extra strength Vitrified Clay
Standards ASTM-C700 with ASTM-C425 Bell and spigot polyurethane joints
Plain end ASTM-C700 with 4 band shear ring coupling (type Z) approved on private property
Local Manufacturer-Mission Clay
2) APPROVED Cast Iron Soil Pipe
Standards -ASTM A 74 for Hub and Spigot Cast Iron Soil pipe and ASTM A746 for fittings. NSF marking ensures compliance with t relevant standards.
No-Hub ~ ASTM 888 CISPI 301. NSF marking ensures compliance with relevant standards. 4 band shear coupling for underground installations. Above ground may be 2 banded shear coupling (CISPI 310 and NSF)
MANUFACTURES- AB&I, Charlotte foundry, Tyler Pipe
Couplings - Anaco and Ideal
3) APPROVED PVC
SDR 26 IPS ASTM D3034 ASTM F477 bell and spigot joints
Schedule 40 ASTM Dl785 & ASTM D2655 (NO cellular core pipe is permitted) Solvent welded on private property
only. Not permitted in public right of way or sewer easement.
4) APPROVED HDPE
SDR 17 DIPS with fused joints ASTM D3035 F714
HDPE SHALL ONLY BE USED WHEN PIPE BURSTING AND TRENCHLESS SEWERS
5) APPROVED DUCTILE IRON PIPE
Class 52 thickness class-350 psi pressure class
Cement or Ceramic epoxy lined (US PIPE PROTECTO 401) AWWA C 151 and AWWA C200
Joints shall conform to AWWA C 111 for push on and Mechanical joints and AWWA C110 for flanged joints
Local Manufacture-US Pipe and Foundry
6) APRROVED ABS PIPE
Schedule 40 ABS shall meet ASTM D2661 standards for solid core pipe and fittings.
Solvent cement shall meet ASTM 2235. (NO cellular core pipe is permitted) Solvent
welded on private property only. Not permitted on sewer in public right of way.
The use of cellular core ABS or PVC pipe shall be rejected.
Inspections:
All piping shall be bedded and haunched to the spring line of the pipe for inspection. All
markings and ASTM makings shall be visible on top of pipe to verify correct standards.
HOUSE SEWERS 4”-6”
Material Types: pipe
1) Cast Iron Service weight Bell and Spigot or No Hub CI
installed with 4 band shear couplings below ground. Above
ground installation of NO HUB CI may be made with
approved 2 band shear couplings. All CI shall be Poly
encased in Public Right of Way or sewer easement.
2) PVC SDR 26 IPS bell and spigot solid wall and Schedule
40 PVC, solvent weld (on private property only).
The use of ABS to PVC transition GLUE prohibited.
Use approved 4 band shear coupling .
3) VCP Extra Heavy with Bell and Spigot or plain end with
shear ring couplings.
4) DIP class 52 thickness, 350 psi class. Bell and Spigot,
mechanical or flanged joints. Poly encased in Public Right
of way or sewer easement.
5) HDPE SDR 17 DIPS with fused joints (allowed for trenchless only).
6) ABS Schedule 40 ABS, solvent weld (on private property
only).
The use of ABS to PVC transition GLUE is Prohibited.
Use approved 4 band shear coupling.
ALL piping shall be installed without stress and to approved standards.
COUPLINGS
All underground transitions to dissimilar materials shall be made with 4 band u shear couplings.
Above ground transitions may be made with approved 2 band shear couplings.
Approved Couplings for Transitions to dissimilar materials &
underground NO HUB installations:
Husky 4 clamp shielded coupling (80 in-lb)
Anaco No-Hub 4 clamp shielded coupling (60 in-lb)
Fernco No-Hub 4 clamp shielded coupling, Silver (60 in-lb), Yellow and Green (80 inlb)
Fernco 4 clamp shielded coupling Strong back RC Couplings, (60 in-lb)
Fernco 50004 clamp shielded coupling Series RC Coupling, (60 in-lb)
Mission adjustable 4 clamp shielded repair coupling coupling.
APPROVED ABOVE GROUND (60 in-lb) NO-HUB TO NO-HUB COUPLINGS:
Ideal 2 banded shielded coupling, CISPI 310 and NSF
Anaco 2 banded shielded coupling, CISPI 310 and NSF (shown below)
6
Couplings
Material Type(s):
Banded Rubber Couplings
Description:
For repairs, alterations and house sewers with connections of
dissimilar materials. Banded rubber couplings shall have four (4)
clamps and metal shear bands.
Manufacturer:
Manufacturers included but are not limited to:
1.
2.
3.
4.
Note:
Fernco®
Mission®
Husky®
Anaco®
Check with Inspector prior to purchase of material to insure proper
coupling is selected for the different pipe types encountered.
Mission® Band Seal
Fernco® Proflex Coupling
Joints® Calder Coupling
Anaco 2-Banded
(60 in-lb)
7
Husky® 4 Clamp Coupling
(80 in-lb)
Fernco® Strong Back RC Couplings
Fernco® No-Hub Couplings
Silver (60 in-lb)
Yellow & Green (80 in-lb)
Fernco® Stainless Steel Shear Rings
(60 in-lb)
Fernco® 5000 Series RC Couplings
Mission® Adjustable Repair Coupling
Anaco No Hub
(60 in-lb)
8
Approved High Density Polyethylene Couplings
Friatec® Frialen
Electrofusion Coupling
9
Standard cover requirements for upper and lower laterals
Upper laterals are collection to the building drain at the structure and do not cross into
the Public right of way or sewer easements’. The lower lateral is the portion of the sewer
that is installed in the Public right of way. Only contractors with a C 42 sewer license or
A contractor is permitted to work in the right of way.
Pipe cover limitation tables
First table is for upper laterals on private property without loading. Plain end VC
is approved with shear ring couplings on upper laterals. For upper laterals under
driveway, use Lower lateral table
Size
4”– 6”
4”– 6”
4”– 6”
4”– 6”
4”– 6”
4”– 6”
4”– 6”
Size
4”– 6”
4”– 6”
4”– 6”
4”– 6”
4”– 6”
UPPER LATERAL TABLE
Min.
Material
depth
ABS Schedule 40 Solid Core
2.5
VC C700 Sewer pipe
2.5
CI SVandNohub
1.5
DI Class 52
1
PVC SDR26 IPS
2.5
HPDE SDR 17 DIPS
2.5
PVC Schedule 40 Solid Core
2.5
LOWER LATERAL TABLE
Min.
Material
depth
VC C700 Bell and spigot only
5
CI* Service weight and No Hub
4
DI* Class 52
1
PVC SDR26 IPS
5
HDPE SDR 17 DIPS
5
Max. depth
24
30
30
30
24
24
24
Max.
depth
30
30
30
24
24
* ALL DIP AND CI SHALL BE POLY ENCASED IN PUBLIC EASEMENT
Standard enclosed
All NO HUB Underground Couplings shall be Heavy Duty shear with 4 bands.
Reinforced Concrete Utility Boxes
Material Type(s):
Traffic Area
Non-Traffic
Area
Utility boxes for traffic and non-traffic areas
ITEM DESCRIPTION
12" x 12" Drain Box
10-3/8" I.D. x 12" Valve Box
Cast Iron Grate
(3/8" Max Spacing) H/20 Loading
8" I.D. x 12" Valve Box
8-1/2" I.D. x 11-3/4" Drain Box
10-5/8" I.D. x 17-1/4" Drain Box
PRODUCT
Christy® V12 Box
Christy® or Jensen® G5 Traffic Valve
Christy® V12-71W Welded Grate
Christy® or Jensen® F8 Box
Christy® V1 Drain Box
Christy® V9 Drain Box
Christy® V1-71C Grate
Cast Iron Grate 3/4" Max Spacing and V9-71C Grate
Christy® V12 Box
Christy® V12-71W
Welded Grate
Christy® G5 Box
Christy® K-6004 Grate
(Special Order)
Christy® F8 Box
Christy® V1-71C
Grate
17
TAPS
Material types: Taps
The portion of the lower lateral in the right-of-way or public easement shall be installed at a 90-degree angle to
the sewer main with a wye-connection oriented in the direction of flow in the main. The wye-connection shall
be installed a minimum of 3 feet from a manhole, and 5 feet from a lamp-hole (sewer main clean-out).
The minimum horizontal distances between adjacent sewer lateral connections shall be:
a) Laterals on the same side of the street/sewer
10(ten) feet
b) Laterals on the opposiste side of the street/sewer 5 (five) feet
Tap materials for the corresponding main sewer
ACP
RCP
CIP, DIP
HDPE
VCP
Fowler saddle
Insert a wye
Fowler saddle Sealtite type “S” saddle with 4 band coupling
Insert a wye
Insert a wye
All other taps shall be performed by Tap-tite or Roto rooter.
Where possible, taps shall be installed above the springline of pipe at an angle not to exceed 45 degrees from
the horizontal.
Effort shall be made to install tap fitting and saddles with a 45 degree (wye) configuration to facilitate
continuous flow velocities into the main. Straight taps can cause hydraulic jump which can cause solids to
drop off and accumulate in the main.
TRANSVERSE SECTION
45˚
min.
Lower lateral
45˚
max.
8 in. main
1/8 bend
Coupling
Min. slope
2% without
special
approval
Saddle
Sewer main
SADDLE CONNECTION DETAIL
Radial connection
CONNECTION AT MAIN
Notes:
1. When a lateral sewer is installed in advance of the building sewer, it shall be terminated with a cap or
plug 5’ past the property line, easement line or last improvement and the Contractor shall mark the
location of the capped/plugged end with a 2x4 pressure treated stake painted green.
2. Refer to section 15.02205 for bedding and backfill requirements.
3. See note 2 on DWG-25 for cover requirements
Criteria For The Separation Of Water Main & Gravity Sanitary Sewers
DOHS Memo # 2003-201
Special
permission
2
Parallel Construction
Special
pipe
Plan View
1
Water Main
B
A
P
6 ft.
3 ft.
1 ft.
Grade
Grade
Special pipe
Crossing
SIDE View
C
No joints
P
6 in.
5 ft.
4 ft.
4 ft.
5 ft.
6 in.
1 ft.
P
D
ZONE “A”: Sewer lines not permitted without approval of
AHJ (Authority Having Jurisdiction)
ZONE “B”: Permitted Materials:
• VC pipe with compression joints
• PVC pipe with rubber ring joints (ASTM 3034)
• C1 or 01 pipe with compo joints
• Rc pressure pipe with compo joints
• HDPE pipe with fusion welded Joints (AWWA C906-99)
• Spirally-reinforced HDPE pipe with gasketed joints
(ASTM F-984)
ZONE “C”: Permitted Materials:
• DI Pipe with hot dip bituminous coating
• C-900 PVC (DR 14). Continuous section centered over pipe being crossed
• RC pressure pipe. Continuous section centered over
pipe being crossed
• Any sewer pipe within a continuous sleeve
• HDPE pipe with fusion welded joints (AWWA C906-99)
ZONE “D”: Permitted Materials:
• DI pipe with hot dip bituminous coating & mechanical
joints
• HDPE pipe with fusion-welded joints (AWWA C906-99)
• C-900 PVC (DR 14) continuous section centered
over pipe being crossed
• RC pressure pipe continuous section centered over pipe being crossed
• Any sewer pipe within a continuous sleeve
ZONE “P”: NOT PERMITTED
EBMUD Private Sewer Lateral Ordinance
How to Prevent Backup from City Main & Protect Your Home
Backwater Device
Drainage piping serving fixtures on a floor, where the floor level is located BELOW the elevation of the next
upstream manhole cover of the public/private sewer system, shall be protected from the backflow of sewage by
installing anapproved Backwater Valve. Section 710.1 UPC
☑ NOTE: Fixtures located on a floor, where the floor level is located ABOVE the next uphill manhole cover elevation shall
not discharge through a Backwater Valve.
Cleanout
Finish grade
2nd floor ABOVE
manhole
1st floor
BELOW
manhole
Manhole cover
Backwater device
Second floor
drain bypasses
backwater
valve
Box & cover containing
backwater valve
Building sewer
Public sewer
To public sewer
No water in building sewer,
flap opens by gravity, rests against
ledge
BUILDING SERVICES DEPARTMENT
250 Frank H. Ogawa Plaza, 2nd Floor, Oakland, CA 94612
Inspection Services: 510.238.3443 FAX: 510.238.2263
Discharge from building into building
sewer, flaw swings upward, letting
discharge flow through
To building
Sewage backflow into building sewer, is
stopped by flap directing sewage flow
into device, building is protected
Illustrations ©2012 Code Check
EBMUD Private Sewer Lateral Ordinance
How to Prevent Backup from City Main & Protect Your Home
Things to Consider when
Replacing Sewer Laterals in
Multistory Dwellings
When owners of a multistory dwelling are
required to replace their private sewer lateral,
it may be determined that the lowest floor
is below the upstream manhole cover. This
condition can cause flooding of the building if
the sewer main has a blockage.
1
2
Current code requires that only fixtures below
the manhole cover drain through the backwater
valve. This prevents occupants on upper floors
from flooding the lower floor accidently. Since
this would require an expensive re-plumbing of
existing buildings, the city will require the use
of a sewer overflow device in addition to
a backwater valve to prevent both a backup
from the main City sewer and the accidental
flooding of the lower floor by owners unaware
that there is a blockage in the sewer. It will
also protect the building in case of blockages
in their own private sewer lateral
1
Sewer overflow device
3
2
Backwater
valve
BUILDING SERVICES DEPARTMENT
250 Frank H. Ogawa Plaza, 2nd Floor, Oakland, CA 94612
Inspection Services: 510.238.3443 FAX: 510.238.2263
6 in.
min.
Finish grade
2
3 in.
min.
Standard
cleanout
4 in. min.
Backwater
valve
Flap prevents
water entry
Lowest floor in structure
1
Sewer overflow device
Finish grade
6 in. min.
3
2 ft. max. to bldg.
6 in.
min.
3 in.
min.
4 in.
min.
Cast in place
concrete
Water pressure
raises ball, water
escapes through
bell
2 ft. max.
to bldg.
Remove standard cleanout plug
4 in.
min.
Ball seated
Lowest floor in structure
Pop-up ball to elimate emission of
odors & access of rodents
see lower left drawing
A sewer overflow device per the approved
materials list is required on ALL side sewer
connections and repairs and/or alternations
on existing side sewers.
The specific location of the sewer overflow
device shall be determined by the contractor
and the property owner such that the top
location of the overflow device is a minimum
of 6 inches below the lowest finished
floor elevation of the connected building.
3
6 in. min. (typical)
Standard cleanout 4 in. min.
Illustrations ©2012 Code Check
Overflow Protection Devices
Material Type(s):
Overflow Protection Devices (OPD)
Description:
Overflow protection devices prevent sewage from entering homes
and businesses and reroute the spill outside the building.
Manufacturer:
MANUFACTURER
Extendable
Backwater Valve
Mainline Backflow
PRODUCT NAME
Products
Rector Seal
Adapt-a-valve Inspection Chamber
with Test-Eze Gate Feature
Clean Check Backwater Valve
Kelly Backwater Device
(No-Hub & IPS)
Sewer Popper™ Model S62-304
"Mushroom"
Genplex
Sewer Popper™
Stephens Corp
Relief Cap
Unlimited Home Solutions LLC
(www.unlimitedhomesolutions.com)
Sewer Relief Cap
Extendable Backwater Valves
ABS
PVC
Sewer Popper™ OPD
“Mushroom” OPD
Sewer Relief Cap
11