Sewerage and Sanitary Works

Preventive Measures

Obtain Sewer Interpretation Plans

QPs/PEs must check for the presence of public sewers, link sewers and deep sewerage tunnels by referring to the Sewer Interpretation Plans.

The Sewer Interpretation plan can be purchased online from:
(1) Website at Yellow Pages Mall or
(2) CBPU (NEA)'s Website

If a project does not commence within 3 months from the date of issue, a new plan should be obtained.

Know the Sewer Protection Zone and the Sewer Set Back

The “Sewer Protection Zone” is defined as the horizontal distance of 25m from the outermost edge of any part of public sewers (including pumping mains) or 36m from the outmost edge of any part of the DTSS tunnel & facilities within which no works either permanent or temporary should be carried out unless the Director, Water Reclamation (Network) Department has given the written permission to do so.

“Sewer Setback” is defined as minimum horizontal distance measured from the outer edge of any structure to either the center-line of the public sewer / pumping main or the outer edge of the public sewer’s pumping bedding.

Click here for details on the Sewer Protection Zone and Sewer Set Back.

Who should apply to PUB?

QP to apply: For works which require the approval of plan by the Building Control Authority under the Building Control Act, the QP who has submitted and obtained the Building Control Authority’s approval must apply to PUB and prepare all plans of works.

PE to apply: For works which do not require the approval of plan from the Building Control Authority under the Building Control Act, an appropriate PE must apply to PUB with all plans of works.

QPs/PEs/Contractors working in the vicinity of the sewerage system must carry out a thorough site investigation to ascertain the exact locations of the sewerage system within and around their project site. They must also mark the locations of the sewerage system and plot the information in the proposal drawings.

Obtain PUB's written clearance before commencing any temporary works, piling works or structure/building works

Where there are public sewers or pumping mains within your development lot or the sites of your proposed works (eg excavation, soil investigation, piling, tunneling, structure, etc), either permanent or temporary, or if your works are within the sewer protection zone [ie. 25m for sewers and 36m for Deep Tunnel Sewerage System (DTSS)], you are required to obtain a written clearance from the Director, PUB Water Reclamation Network (WRN) before carrying out the works at the site.

If the public sewers are within or adjacent to your development lot, the QP is required to submit an application form together with pre-construction CCTV** survey reports & DVD Discs to show the conditions of all these existing sewers, SIP and other supporting documents as specified in the application form to PUB (WRN), and obtain a written clearance from the Director, PUB (WRN) before carrying out any temporary works/piling works/building works at the site. These requirements are stipulated in the “PUB (WRN) Advisory Note -Prevention of Damage to Sewerage System ”.

Failure to obtain an approval from PUB before carrying out any works over, across or adjacent to any public sewer is a violation to Section 14 of the Sewerage and Drainage Act. Offenders are liable for enforcement actions.

** Requirements for carrying out CCTV Inspection Survey

Important Announcement

From 1 Jan 2013, PUB only accepts inspection and reports from PUB registered CCTV contractors.

Please find the latest list of PUB registered CCTV contractors here.

For more information please refer to here.

QPs are to comply with all requirements stipulated under the PUB (WRN) CCTV Inspection Requirements for Sewers and Manhole to ensure that the standardised CCTV Inspection Survey Report format submissions are supported with high quality videos and photographs.

Consultation can be made at the following address:
Director
Water Reclamation (NetWork) Department, PUB
#14-00 Environment Building
40 Scotts Road
Singapore 228231

For enquiry, please call 6731 3256, 6731 3245 or 6731 3264

QPs/PEs shall comply with “PUB (WRN) Advisory Notes- Prevention of Damage to Sewerage System” at all times, subject to PUB’s consultation and requirements.

Notify PUB's Network Management Branch (NMB)

QPs/PEs/Contractor shall consult PUB's Network Management Branch (NMB) (@82, TOH GUAN ROAD EAST #C2-13 / 14 WATERHUB TOH TUCK COMPLEX SINGAPORE 608575, Tel: 6289 4013) when they are unable to locate existing manholes/ chambers/sewers/pumping mains, etc which are indicated on the SIP at the work site.

QPs/PEs/Contractors shall submit a Notification to our Network Management Branch (NMB) at least 7 days before commencement of any excavation works near any sewers or sewerage system.


WHAT TO DO WHEN A SEWER IS DAMAGED
• Stop all work activities in the vicinity of the sewer. • Inform PUB Call Centre at our 24-hr toll-free number 1800-284 6600 or call our Network Management Branch (NMB) at 6289 4013 • Inform your QPs/PEs • Remain on site to assist PUB officers on their arrival

Good Practices

Due care and diligence during piling works and structure works can protect the underground public sewers, link sewers and deep sewerage tunnels from being damaged. QPs, PEs & Contractors play an important role in ensuring preventive measures are in place.

Please note the "Dos and Don't" on the prevention of damage to the public sewerage system.

1. Sanitory Works Requirements

All sanitary works shall be carried out in accordance with the requirements of the Code of Practice on Sewerage and Sanitary works and shall comply with the provisions of the Sewerage and Drainage Act (Chapter 294), the Sewerage and Drainage (Sanitary Works) Regulations.

The Singapore Plumbing Society (SPS) maintains a list of qualified plumbers to serve the construction industry and the public. The list of SPS Registered plumbers is published in the SPS website at URL address: www.plumbing.org.sg. If you need the service of a SPS registered Plumber, you may surf the SPS website or contact the SPS at Tel: 62949252 or e-mail: sinspa@singnet.com.sg

Developers, QPs/PEs and house owners are encouraged to engage SPS registered plumbers to carry out the sanitary/sewerage works for your projects.

2. Sanitary Works for New Development and Additions & Alterations Projects

Detailed plans for sanitary works for developments requiring Building Plan / Detailed Plan submission under the Building Control Act /Sewerage and Drainage Act are required to be submitted by the Qualified Person (QP) via BCA Corenet e-submission system to the Central Building Plan Unit (CBPU) of the National Environment Agency (NEA) for registration and obtaining the clearance certificate. The QP shall use the standard application form "Application for Clearance Certificate for DP on Sewerage" to apply to CBPU (NEA) for the Clearance Certificate.

Upon obtaining clearance of the Detailed Plan (Sanitary) from CBPU (NEA), the QP is required to notify the Water Reclamation (Network) Department (PUB) on the commencement of sanitary works via BCA Corenet e-submission system and apply for PUB(WRN)’s approval before allowing the workmen to enter the public sewer/manhole or other confined spaces to carry out any works including inspection.

During the progress of the sanitary works, the QP is required to carry out his own checks/inspections/water test to ensure that the sanitary works are constructed in accordance with the registered plans.

Upon completion, the QP is required to inspect the completed sanitary works and rectify all defects. The QP will then submit the Form C/QP [and Form C1/QP, if applicable] and a set of the "As-Built" plans via BCA Corenet e-submission system to Water Reclamation (Network) Department (PUB) to certify the completion of the sanitary works.

The Water Reclamation (Network) Department (PUB) may inspect the completed sanitary works before issuing the Compliance Certificate to the QP and the Sewerage Clearance for TOP/CSC to CBPU (NEA).

The QP shall give at least 3 weeks of advance notice to PUB (WRN) to carry out the inspection/water tests to avoid delay in obtaining the Compliance Certificate.

3. Simplified Submission for Additions and Alterations to Landed Houses (Detached, Semi-detached, Terrace and Linked House)

The submission system is applicable to addition and alteration to existing landed houses only. It is a simplified submission system without the need to obtain technical clearance from CBPU of the National Environment Agency (NEA) both at the building plan submission stage and CSC application stage. The QP must purchase the SIP (Sewerage Interpretation Plan) from CBPU and ensure that his proposal does not affect the existing public sewer before making the submission directly to BCA. To qualify for submission under the simplified procedure, the proposal shall satisfy the requirements below:

(1) no public sewer within the development lot or the proposed building/structure extension is not built over/across the sewer or less than the required clearance from the sewer within the development lot.

(2) no new sewer connection to public sewer outside the development lot.

(3) no new minor sewer extension works. For submission to BCA, QPs shall comply with the procedure as published in the BCA website http://www.bca.gov.sg ( Building Plan > Simplified Submission (Landed House) > General) Upon BCA's approval of the building plan, BCA will then forward a copy of the approval letter, Building Plan and the declaration form to CBPU/WRN for record. Upon completion of works, the QP shall submit the Form C/QP to WRN. There is no audit inspection by the Water Reclamation (Network) Department and no issuance of CSC clearance by CBPU.

For further information, please contact our officers at the following telephone numbers:-
Ulu Pandan Catchment Area -
Tel: 6731 3256 or 6731 3249

Bedok/Jurong Catchment Area -
Tel: 6731 3245 or 6731 3253

Kim Chuan Catchment Area-
Tel: 6731 3264 or 6731 3298

Kranji/Seletar Catchment Area -
Tel: 6731 3256, 6731 3264 or 6731 3254

Flow Chart B

(Sanitary Works for development and A/A projects)

Form A/QP*

(Commencement)

Form B/QP

Form B1/QP

(Connection)

Form C/QP

(Certificate of Completion and Inspection-
Sanitary Works)

Form C1/QP

(Certificate of Completion and Inspection-M&E)

The e-forms are available only at BCA Corenet e-submission system. The QP is required to submit the respective forms at various construction stages via BCA Corenet e-submission system to PUB(WRN).

*FORM A/QP – There will be no formal reply from PUB(WRN). QP shall read the advisory notes for Commencement of Sanitary / Sewerage Works.

4. Minor Sanitary Works

For A & A works that involves new provision and installation of grease trap and new sanitary plumbing and drainage system in an existing premises/building (which originally has no sanitary facilities), the Owner/Occupier/contractor shall submit an on line application Form F to the Water Reclamation (Network) Department for approval of the proposed works. The layout/detailed plan showing the proposed sanitary works shall be submitted together with the application.

House owners/Occupiers of the premises are encouraged to engage a SPS registered plumber, to carry out the minor sanitary works.

Exemption:
For minor sanitary works such as the repair, removal or replacement of WCs/floor traps and defective/corroded sanitary piping or any addition to existing sanitary facilities or sanitary appliances in an existing premises/building, submissions of plans and notification for commencement and completion of the works are not required.

However, in the case of addition/deletion of WCs/urinals in the premises, the Owner/Occupier is required to notify the Water Reclamation (Network) Department within one month of the change in the quantity of sanitary fittings installed in the premises. This is for the Department to arrange with SP Services Ltd to adjust the Sanitary Appliances Fee (i.e. $3.00* per fittings) which is billed monthly through the SP Services Ltd Bill.

For further information, please contact our officers at 6731 3582, 6731 3306 or 6731 3297

5. Temporary Sanitary Facilities at Trade Fairs

For provision of temporary toilet/sanitary facilities at trade fairs, after the organiser has obtained the NEA's trade fair permit, the plumber / operator / contractor shall submit an online application Form I attaching the detailed plans showing the proposed connection of the temporary toilets/ sanitary facilities to public sewers/holding tanks to the Water Reclamation (Network) Department for approval.

General Requirements for Temporary Sanitary Facilities for Trade Fairs

For further information, please contact our officers at 6731 3306, 6731 3297 or 6731 3264.

6. Temporary Sanitary/Toilet Facilities at Construction Sites

For provision of temporary toilet/sanitary facilities at construction sites, after the QP has registered the detailed plans on environmental health for provision of temporary toilets with CBPU (NEA), the contractor/plumber shall submit an online application Form E attaching the detailed plans showing the proposed connection of the temporary toilets/ sanitary facilities to public sewers/holding tanks to the Water Reclamation (Network) Department for approval

He is also required to notify the Water Reclamation (Network) Department of the completion of the temporary toilet/sanitary/sewerage works via online Form H and submit the online Form G to declare the quantity of sanitary fittings installed), as well as the SP Services Ltd Utilities Account Bill number to facilitate the charging of Sanitary Appliances Fee.

General Requirements for Temporary Sanitary Facilities for Construction Site.

For further information, please contact our officers at 6731 3582, 6731 3306 or 6731 3297.

Flow Chart C

(Temporary Toilet Facilities)

Form E: Temporary Toilet Facilities

Form F: New Sanitary Works at Existing Premises / Shops

(Application)

Form B/QP

Form B1/QP

(Connection)

Form G: Sanitary Fitting Qty

(Declare the Number of Sanitary Fittings Installed)

The Form E, Form F, Form –Trade Fair and Form G are also available for on line submission at PUB e-services webpage.

For sewer connection to existing sewer manhole, the Form B can be submitted via BCA Corenet e-submission system to PUB(WRN).

7. Sewerage Works

Detailed Plan for sewerage works (Sewer/Sewage treatment plant) are required to be submitted by a QP (Professional Engineer) via BCA Corenet e-submission system to the Central Building Plan Unit (CBPU) of the Planning and DevelopmentDepartment (PDD), NEA for registration and obtaining the clearance certificate. The QP shall use the standard application form "Application for Clearance Certificate for DP on Sewerage" to apply to CBPU (NEA) for the Clearance Certificate.

Upon obtaining clearance of the Detailed Plan (Sewerage) from CBPU (NEA), the QP (PE) responsible for the sewerage works is required to notify the Water Reclamation (Network) Department (PUB) via BCA Corenet e-submission system on the commencement of sewerage works and apply for PUB(WRN)’s approval before allowing the workmen to enter the public sewer/manhole or other confined spaces to carry out any works including inspection.

During the progress of the sewerage works, the QP is required to carry out his own checks to ensure that sewerage works are constructed in accordance with the registered plans.

Upon completion, the QP is required to inspect the completed sewerage works and rectify all defects. The QP will then submit the Form C/QP [and Form C1/QP, if applicable] and two sets of the "As-Built" plans (to be endorsed by Registered Surveyor) via BCA Corenet e-submission system to the Water Reclamation (Network) Department (PUB) to certify completion of the sewerage works.

Water Reclamation (Network) Department (PUB) may inspect the completed sewerage works before issuing the Compliance Certificate to the QP and Sewerage Clearance for TOP/CSC to CBPU (NEA).

The QP shall give at least 3 weeks of advance notice to PUB (WRN) to carry out the inspection/water tests to avoid delay in obtaining the Compliance Certificate.

For further information, please contact our officers at the following telephone numbers:-

Ulu Pandan Catchment Area - Tel: 67313256 or 6731 3249

Bedok/Jurong Catchment Area - Tel: 67313245 or 67313253

Kim Chuan Catchment Area- Tel: 6731 3264 or 6731 3298

Kranji/Seletar Catchment Area - Tel: 67313249 or 67313264

The procedure to be followed by QP/Contractor for the construction of sewerage works are as follows:

Flow Chart A

(Sewerage Works)

Form A/QP*

(Commencement)

Form B/QP

Form B1/QP

(Connection)

Form C/QP

(Certificate of Completion and Inspection-
Sewerage Works)

Form C1/QP

(Certificate of Completion and Inspection-M&E)

The e-form are available only at BCA Corenet e-submission system. QP is required to submit the respective form at various construction stages via BCA Corenet e-submission system to PUB(WRN).

*FORM A/QP – There will be no formal reply from PUB(WRN). QP shall read the advisory notes for Commencement of Sanitary / Sewerage Works.

8. Sanitary Wares, Pipes and Fittings, Manhole/Inspection Chamber Frames and Covers

The sanitary wares, pipes and fittings, manhole/inspection chamber frames and covers used in the construction of a sanitary plumbing and drainage system shall be of a design and construction complying with the Singapore Standards or other acceptable Standards prescribed in the Code of Practice on Sewerage and Sanitary Works. Separate approval from the Water Reclamation (Network) Department (PUB) for their use is not required. However, the Water Reclamation (Network) Department (PUB) may require valid certificates/test reports to be submitted for verification.

The sanitary ware, pipes and fittings, manhole/inspection chamber frames and covers shall be clearly embossed or permanently marked with the brand name/trade mark, the country of origin and the Standards which the product conforms to at a conspicuous position so that they can be clearly identified.

The sanitary ware, pipes and fittings, manhole/inspection chamber frames and covers for use in sanitary works/sewerage works may be listed in the "Product Listing Scheme (PLS)" administered by the PSB Singapore. The PLS directory can be viewed at PSB Singapore’s website at URL Address: http://www.psbcorp.com/productlisting.aspx

9. Temporary Occupation Permit (TOP) and Certificate of Statutory Completion (CSC)

The Water Reclamation (Network) Department (PUB) issues sewerage clearance to advise the Central Building Plan Unit (CBPU) of NEA to grant Clearances for TOP/CSC when all requirements of the Water Reclamation (Network) Department (PUB) pertaining to sewerage, sanitary, mechanical and electrical works have been complied with and is certified to be in order by the QP.

The QP shall submit the standard form "Application for TOP Clearance" or "Application for Compliance Certificate (CSC Clearance)" to CBPU (NEA) via BCA Corenet e-submission system to apply for TOP Clearance or CSC clearance for a completed development when all the requirements pertaining to sewerage/sanitary, drainage, environmental health and pollution control are complied with.

For further information, please contact our officers at the following telephone numbers:-

Ulu Pandan Catchment Area - Tel: 67313256 or 6731 3249

Bedok/Jurong Catchment Area - Tel: 67313245 or 67313253

Kim Chuan Catchment Area- Tel: 6731 3264 or 6731 3298

Kranji/Seletar Catchment Area - Tel: 67313249 or 67313264

CBPU (NEA) – TOP/CSC Team at 67319527

10. Declaration of Quantity of Sanitary Fittings Installed in Premises

A Sanitary Appliance Fee of $ 3.00 (after GST) per month is chargeable for each of the sanitary fittings (as listed below) installed in any premises and connected to any public sewerage system

SP Services Ltd is the PUB authorised collection agent for the Sanitary Appliance Fee. The Sanitary Appliance Fee is billed monthly through the SP Services Ltd Utilities Account.

The Owner/Occupier (or the SP Services Ltd Account holder) of the premises shall submit an online Form G to inform the PUB within one month of the changes in the quantity of the sanitary fittings installed in their premises.

For further information, please contact our officers at 6731 3302.

11. Types of Chargeable Sanitary Fittings

Sanitary fittings/ appliances	Charges per month	Pictures
(a) water closet	$3.00*
(b) bidet	$3.00*	(A low, bowl-shaped bathroom fixture with running water for bathing the crotch.)
(c) slop-sink	$3.00*	(A sink fixed with a flushing device for use in hospitals/nursing homes.)
(d) urinal	$3.00* per bowl or stall or for every 610 millimetres length of slab.

* Inclusive of GST, rounded to the nearest cent. The consumer is advised to refer to the invoice should they wish to make a claim for input tax.