Sewer Connection Section 106/107 Water Industry Act 1991
Call 0207 536 2778
We offer a a developer/home owner advice and design assistance in order to make a New Connection Public Sewer 106/107. The owner of a building has a lawful right to have that building – or its drain or sewer – connect to a public sewer for domestic sewerage purposes. This right is given and controlled by the Water Industry Act 1991.Section 106 of The Water Industry Act 1991 requires anyone intending to make a connection to a public sewer to give 21 days notice. Once approved, they generally allow the applicant to make the connection with our inspector monitoring the work to ensure that it is done to the required standard.
There are two levels of charges for sewer connections dependent on whether the connection is in public highway or private land.
The applicant arranges for their contractor to make the connection. All costs involved fall to the applicant. We recommend that a suitably qualified and experienced contractor is used.
Connections of highway drainage/road gullies are to be treated as connections in private land as these pipes cannot be adopted by the Water Authority.
When a property is connected to the public sewer network for the first time, a sewerage infrastructure charge is payable. This is usually collected at the same time as the charges for any new water supply to the property.
Foul water shall not be disposed of to a surface water sewer and surface water should generally not be discharged to a foul or combined sewer.
If the work involves excavations in the public highway (including footways and grass verges) We will obtain consent from the Highway Authority (Local or County Council). The Highway Authority will require you to use an approved or certified contractor in accordance with the New Road and Street Works Act 1991
We will ensure that all sewer connections properly designed connections and shall be inspected and approved by the Water Authorities inspector before any additional pipes are laid or before concreting or back-filling.
Water Authorities have the power, under Section 106 of the Water Industry Act 1991 to refuse to permit a connection to a public sewer that appears to be prejudicial to the public sewer network in terms of the:
Mode of construction of the connection, or Condition of the drain or sewer
We are very successful in negotiation regarding these issues and have had many failed schemes approved after input from us.
WATER CONNECTION FOUL CLEAN
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Connections to Public Sewers shall preferably be made using Methods of Connection that protect the integrity of the public sewer which must be maintained at all times.Anyone intending to make a connection to a public sewer is required by law to give the Statutory Undertaker notice. New Connection Application Forms should be completed and submitted along with the appropriate fee (see Administration and Inspection Fees below) to:
On receipt of correctly completed form and correct fee Water Authorities will post out your Receipt of Notice which includes your unique connection reference number. Within the 21 day notice period Water Authorities may object (in writing) to the connection or make comment on how it should be undertaken.
We therefore advise that you plan your work to allow adequate time for the 21 day notice period to elapse before proceeding with the work and arranging inspection..
When planning highway excavations you may pass a copy of your Certificate of Connection Application to the Local Highway Authority as proof that you have given notice of making the connection (see Permissions to be sought by Developer below).
Health and Safety
Sewers including manholes and trenches into which a sewer can vent are hazardous places and need special safety precautions. Your attention is drawn to the Confined Space Regulations 1997 and the document Safe Working in Sewers and at Sewerage Works published by the National Joint Health and Safety Committee for Water Services.Agreement to the Works by Water Authorities should not be taken as confirmation that your proposed method of working complies with these documents or represents a safe system of work.
No person should enter a manhole on the public sewerage system without having had the appropriate Confined Space entry training. They must have all necessary safety equipment and ensure that they comply with all relevant health and safety requirements. Permissions to be Sought by Developer
Where the connection crosses any land not in the ownership of the developer, he must first seek permission to undertake the works from the landowner or the connection will be unlawful.
If the work involves excavations in the public highway (including footways and grass verges) consent from the Local Highway Authority will be required. The Local Highway Authority will require you to use a certified contractor in accordance with the New Road and Street Works Act 1991.
Discharges to Public Sewer
Drainage shall not be discharged recklessly. The necessary checks must be undertaken. To avoid pollution and potential penalties, foul water shall only be disposed of to foul or combined water sewers.
Surface water shall not be disposed of to foul sewer. Disposal of surface water can have a significant impact on sewer flooding. Please refer to your Planning and Building Regulations conditions of approval (if any) and to the Hierarchy for surface water disposal as described in Building Regulations Approved Document H3 Section 2.
Administration and Inspection Fees
Water Authorities charge a fee for administration and inspection of new connections to public sewer. This is payable in advance and is not refundable. Please therefore ensure that you are actually connecting to a public sewer and not a private sewer by checking the statutory public sewer record map beforehand (see Locating Existing Sewers and Services below). Your fees cannot be refunded if it is later discovered that your connection is actually to a private sewer.
A property also becomes liable for sewerage charges when it first becomes connected to a public sewer. A sewerage infrastructure connection charge is payable at that time. This is not dealt with as part of the sewer connection application process. It is collected along with charges for new water supply. We advise that the property owner should, on receipt of their Water Authorities Utility Bill, check that sewerage charges are levied for the property along with water charges and, if not, to contact Water Authorities Billing.
Locating Existing Sewers and Services
It is the responsibility of the developer to confirm feasibility and identify existing sewer and services positions on site. This work should be undertaken by a competent contractor.
Water Authorities keep a Statutory Public Sewer Record Map. This shows the recorded position of public sewers and disposal mains together with private sewers under a Section 104 Sewer Adoption Agreement.
Each Local Authority (Council) within our area also has a copy of the Statutory Sewer Map for their district. This is available for viewing only at an office of the Local Authority.
Methods of Connection
Connection to Public Sewer Pipe by Oblique (Y-Piece) Junction
Oblique junctions shall be flexible. Rigid joints will not be permitted. Flexible couplings must comply with the requirements of the Water Industry Specification 4-41-01 Specification for flexible couplings for gravity sewer and drainage pipes. Oblique junctions shall be the same material as the existing public sewer and placed in the direction of flow at a 2 / 10 oclock position on the existing public sewer section clock face. The connection must be at least 225mm from a collar or spigot.
Connection to Public Sewer Pipe by Saddle
The use of saddles to clay or concrete sewers is acceptable where the Public Sewer diameter is three increments larger than the connection diameter, e.g. a 300mm dia. Public Sewer can only be connected to by a 100mm dia. saddle. Saddle connection must be positioned at 10 oclock or 2 oclock and at an angle of 45 degrees to the direction of flow. A single hole in the Public Sewer must be made by diamond core drilling.
Saddles shall be the same material as the existing public sewer and positioned at 2/10 oclock position on the existing sewer section clock face. The connection must be at least 225mm from a collar or spigot.
Connection to Public Brick Sewers (Including Flat Slab Tops)
The orifice for the new connection should be made by carefully core drilling or removing bricks from the side of the sewer, preferably within the top third. Where applicable, the top slab may be temporarily taken off to aid this process. The connection should not be made by attempting to core drill the top slab.
Connection to Existing Public Manholes
This is not a preferred method of connection. The existing manhole may not be able to accommodate the new connection. If the existing manhole is found to be unsuitable for connection then the connection proposals will have to be revised.
If the manhole is suitable, the new pipe shall be connected in such a manner that the soffit levels of the existing and new pipes are the same. Where the existing manhole has a preformed invert, then the invert of the connection should be formed and made good in granolithic concrete as required. Pipes in manholes shall not be plastic.
If it is impractical (due to corresponding pipe levels) to connect into the existing manhole at the same soffit level as the existing public sewer, then a backdrop arrangement may be constructed outside the manhole chamber to Sewers for Adoption 6th Edition Specification. Internal back drops are rarely accepted. They should be ductile iron and full detail drawings and method statements must be submitted for express written approval.
Connection to Public Sewer by New Inspection Chamber
This is not preferred and is only permitted up to a depth of 2m and not in public highway.
Polypropylene inspection chambers (PPIC) or rectangular pre-cast concrete inspection chambers in accordance with attached approved list of manufacturers may be used where not in highway. Concrete surround shall be provided to inspection chamber where subject to vehicle loading (e.g. driveways). For depths in excess of 1.2m a restricted access opening of 350mm diameter (or 300x300mm square) shall be used.
Inspection chamber covers shall be ductile iron and the appropriate strength for the area situated (minimum classification B125).
Back drop connections (if applicable) shall be external and to Sewers for Adoption 6th Edition Specification.
Connection to Public Sewer by New Manhole
This is acceptable for larger drainage schemes.
Manholes shall be Pre-cast concrete ring Type to Sewers for Adoption 6th Edition Specification.
Manhole covers shall be ductile iron and appropriate strength for the area situated (D400 when in public highway, shared drives or car parks, otherwise B125 where in soft areas).
Adoptable Connections (Laterals)
An adoptable lateral is an accessible single length of drain (serves 1 property) or sewer (serves more than 1 property) not greater than 150mm diameter from a property to a public sewer on adjacent land or highway. A demarcation chamber should be positioned at the head of the lateral at a position 1m inside the property boundary.
Rising (pumping) mains are not acceptable as adoptable laterals. Hatch boxes are not acceptable as demarcation chambers.
Adoptable Connections (Laterals) Pipes
Vitrified Clay Pipes to BS EN 295 kitemarked.
Structured Wall Unplasticised PVC pipes to WIS 4-35-01 kitemarked.
|Product Name||Diameter (mm)||Manufacturer||Material|
|SuperSleve||100 & 150 (I.D.)||Hepworth||Vitrified Clay|
|Superseal||150 (I.D.)||Hepworth||Vitrified Clay|
|Densleeve||100,150 (I.D.)||Naylor||Vitrified Clay|
|Denseal||100, 150 (I.D.)||Naylor||Vitrified Clay|
|Ultra-Drain||110 & 160 (O.D.)||Uponor||uPVC|
|Plastidrain||110 & 160 (O.D.)||Hepworth||uPVC|
|OsmaDrain||110 & 160 (O.D.)||Wavin||uPVC|
|Osma UltraRib||150 (I.D.)||Wavin||uPVC|
|Solid Wall||110 & 160 (O.D.)||Marley||uPVC|
|Underground Drain||110 & 160 (O.D.)||Polypipe||uPVC|
Adoptable Connections (Laterals) Pipe Bedding
Pipes shall be provided with single size full granular bed and surround (class S). Pipes in highway with less than 1.2 metres cover shall not be plastic and shall be protected by reinforced concrete slab placed above.
Adoptable Connections (Laterals) Size and Gradients
Foul: 100mm less than 10 properties min gradient 1:80
150mm greater than 10 properties min gradient 1:150
Combined: 150mm less than 10 properties min gradient 1:100
150mm greater than 10 properties min gradient 1:150
Surface Water: Minimum diameter is 150mm at min gradient 1:150.
For combined and surface water the minimum acceptable diameter is 150mm.
Adoptable Connections (Laterals) Demarcation Chambers
Precast Concrete to BS 5911:Part 2 and BS8301 kitemarked, up to 1.0 metre deep
Polypropylene Inspection chambers to BS 7158:2001 kitemarked, min. 450mm diameter, up to 2.0 metres deep.
|Manufacturer||Product Name||Material||Max. Depth||Cover Type|
|Naylor||Plastic Inspection Chamber||Polypropylene||Up to 1200mm||Class B125|
|Hepworth||PPIC||Polypropylene||Up to 1200mm||Class B125|
|Uponor||Inspection Chamber (450mm )||Polypropylene||Up to 1200mm||Class B125|
|Marshalls||Inspection Chamber To BS5911 pt 2||Precast concrete||Up to 1000mm||Class B125|
|Wavin||Osma UltraRib Inspection Chamber||Polypropylene||Up to 1200mm||Class B125|
|Wavin||OsmaDrain Universal Inspection Chamber||Polypropylene||Up to 1200mm||Class B125|
|Wavin||Non Entry Inspection Chamber||Polypropylene||Up to 2000mm||Class B125|
|Marley||Inspection Chamber (450mm )||Polypropylene||Up to 1200mm||Class B125|
|Polypipe||110mm Inspection Chamber (460mm )||Polypropylene||Up to 1200mm||Class B125|
|Polypipe||Non Man Entry Deep Inspection Chamber System||Polypropylene||Up to 2000mm||Class B125|
Concrete surround shall be provided to demarcation chamber where subject to vehicle loading (e.g. driveways). For depths in excess of 1.2m a restricted access opening 350mm diameter (or 300x300mm) shall be used.
Alternatively, pre-cast concrete ring manhole to Sewers for Adoption 6th Edition Specification may be used as demarcation chamber. Chamber covers shall be ductile iron and appropriate strength for area situated (minimum classification B125).
Inspection by Water Authority Inspector
All completed connections must be inspected by a Inspector so that a Certificate of Satisfactory Inspection may be issued. The completed connection should be laid open for inspection. If the completed connection is backfilled without inspection by a Water Authorities Inspector the developer may later be invoiced for our CCTV costs and any costs for corrective work.
The inspection is to check workmanship only. The location and sizes of all pipes and services should be established by the developer on site prior to commencing the works. The Water Authorities statutory sewer record map is indicative and may be used as a guide only. No warranty is given with regard to its correctness.
The developer may have to correct any work that has been carried out before receipt of Water Authorities comments if the 21 day notice period has not elapsed. Additional fees will be payable for return visits to inspect corrective work.
New Connection Public Sewer Section 106/107 Water Industry Act 1991
Call 0207 536 2778
Thames Water – Thames Water build over – Thames Water problems – Thames Water new connection – Thames Water Sewer Diversion
Anglian Water – Anglian Water build over – Anglian water problems – Anglian Water new connection – Anglian Water Sewer Diversion
Essex Water – Essex Water build over – Essex Water problems – Essex Water new connection – Essex Water Sewer Diversion