Standard Specifications For Private Sewer Laterals

Transcription

1 BUILDING SERVICES DEPARTMENT 250 Frank H. Ogawa Plaza, 2nd Floor, Oakland, CA Inspection Services: FAX: Standard Specifications For Private Sewer Laterals APPROVED MATERIALS LIST City of Oakland 2012

2 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

3 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 (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.

4 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.

5 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 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

6 Couplings Material Type(s): Description: Manufacturer: Note: Banded Rubber Couplings For repairs, alterations and house sewers with connections of dissimilar materials. Banded rubber couplings shall have four (4) clamps and metal shear bands. Manufacturers included but are not limited to: 1. Fernco 2. Mission 3. Husky 4. Anaco Check with Inspector prior to purchase of material to insure proper coupling is selected for the different pipe types encountered. Mission Band Seal Joints Calder Coupling Fernco Proflex Coupling Anaco 2-Banded (60 in-lb) 7

7 Husky 4 Clamp Coupling (80 in-lb) Fernco Stainless Steel Shear Rings (60 in-lb) Fernco Strong Back RC Couplings Fernco 5000 Series RC Couplings Fernco No-Hub Couplings Silver (60 in-lb) Yellow & Green (80 in-lb) Mission Adjustable Repair Coupling Anaco No Hub (60 in-lb) 8

8 Approved High Density Polyethylene Couplings Friatec Frialen Electrofusion Coupling 9

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35 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 UPPER LATERAL TABLE Size Material Min. depth Max. depth 4 6 ABS Schedule 40 Solid Core VC C700 Sewer pipe CI SVandNohub DI Class PVC SDR26 IPS HPDE SDR 17 DIPS PVC Schedule 40 Solid Core Size LOWER LATERAL TABLE Min. Material depth Max. depth 4 6 VC C700 Bell and spigot only CI* Service weight and No Hub DI* Class PVC SDR26 IPS HDPE SDR 17 DIPS 5 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.

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37 Reinforced Concrete Utility Boxes Material Type(s): Utility boxes for traffic and non-traffic areas Traffic Area Non-Traffic Area ITEM DESCRIPTION PRODUCT 12" x 12" Drain Box Christy V12 Box 10-3/8" I.D. x 12" Valve Box Christy or Jensen G5 Traffic Valve Cast Iron Grate (3/8" Max Spacing) H/20 Loading Christy V12-71W Welded Grate 8" I.D. x 12" Valve Box Christy or Jensen F8 Box 8-1/2" I.D. x 11-3/4" Drain Box Christy V1 Drain Box 10-5/8" I.D. x 17-1/4" Drain Box Christy V9 Drain Box Cast Iron Grate 3/4" Max Spacing Christy V1-71C Grate and V9-71C Grate Christy V12 Box Christy G5 Box Christy F8 Box Christy V12-71W Christy K-6004 Grate Christy V1-71C Welded Grate (Special Order) Grate 17

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40 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 Fowler saddle RCP Insert a wye CIP, DIP Fowler saddle Sealtite type S saddle with 4 band coupling HDPE Insert a wye VCP 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 8 in. main 45 max. 1/8 bend Coupling Saddle Sewer main SADDLE CONNECTION DETAIL CONNECTION AT MAIN Radial connection Min. slope 2% without special approval 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 for bedding and backfill requirements. 3. See note 2 on DWG-25 for cover requirements

41 Criteria For The Separation Of Water Main & Gravity Sanitary Sewers DOHS Memo # Special permission Parallel Construction Special pipe 1 Water Main Plan View B A P 6 ft. 3 ft. 1 ft. Grade Grade Special pipe Crossing No joints C SIDE View 6 in. 5 ft. 1 ft. 4 ft. 4 ft. 6 in. 5 ft. P P D ZONE A : Sewer lines not permitted without approval of AHJ (Authority Having Jurisdiction) 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 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 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

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43 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 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 1st floor BELOW manhole 2nd floor ABOVE manhole Manhole cover Finish grade Second floor drain bypasses backwater valve Backwater device Box & cover containing backwater valve Building sewer Public sewer To public sewer To building No water in building sewer, flap opens by gravity, rests against ledge BUILDING SERVICES DEPARTMENT 250 Frank H. Ogawa Plaza, 2nd Floor, Oakland, CA Inspection Services: FAX: Discharge from building into building sewer, flaw swings upward, letting discharge flow through Sewage backflow into building sewer, is stopped by flap directing sewage flow into device, building is protected Illustrations 2012 Code Check

44 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 Sewer overflow device Pop-up ball to elimate emission of odors & access of rodents see lower left drawing Remove standard cleanout plug Finish grade 3 Lowest floor in structure 2 ft. max. to bldg. 6 in. min. 3 in. min. 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 2 Backwater valve Flap prevents water entry Standard cleanout 4 in. min. 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. Lowest floor in structure 3 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. 1 Sewer overflow device Finish grade 6 in. min. 3 2 ft. max. to bldg. Ball seated 4 in. min. 6 in. min. 2 Backwater valve Cast in place concrete 3 in. min. 4 in. min. Water pressure raises ball, water escapes through bell 6 in. min. (typical) Standard cleanout 4 in. min. BUILDING SERVICES DEPARTMENT 250 Frank H. Ogawa Plaza, 2nd Floor, Oakland, CA Inspection Services: FAX: Illustrations 2012 Code Check

45 Overflow Protection Devices Material Type(s): Description: Overflow Protection Devices (OPD) Overflow protection devices prevent sewage from entering homes and businesses and reroute the spill outside the building. Manufacturer: Extendable Backwater Valve MANUFACTURER Mainline Backflow Products PRODUCT NAME Adapt-a-valve Inspection Chamber with Test-Eze Gate Feature Rector Seal Clean Check Backwater Valve "Mushroom" Genplex Kelly Backwater Device (No-Hub & IPS) Sewer Popper Stephens Corp Sewer Popper Model S Relief Cap Extendable Backwater Valves Unlimited Home Solutions LLC ( Sewer Relief Cap ABS PVC Mushroom OPD Sewer Popper OPD Sewer Relief Cap 11

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