Domestic Cold and Hot Water Supply Piping System Checklist:

Please note: You can take idea from this content you can add and remove as per project specification:

Content of Checklist:

  1. Water Supply Installation Checklist
  2. Cold Water Piping System (Underground) Checklist
  3. Checklist for Testing of Water Supply Piping System and Accessories:

Ref. No:
Revision No: 0
Page:

Subcontractor:
Contractor:
Section of Work: Water Supply
Location:
Level:
WIR No.:

Stage: Setting Out

  • Verify layout accuracy.
  • Confirm levels with MEP/Civil coordination.
  • Ensure chipping in the wall is completed where necessary.

Stage: Installation

Service Clearances

  • Confirm adequate clearances for services.
  • Ensure approvals from consultant site team (civil) are obtained.

Material and Size Verification

  1. Ensure all materials are as per the approved material submittal.
  2. Verify that pipe sizes match those specified in the approved drawings.

Piping Layout and Components

  1. Ensure all pipes installed inside walls follow the approved shop drawings.
  2. Confirm isolation valves are located as indicated in the approved drawings.
  3. Check that expansion/contraction joints are installed according to approved drawings.
  4. Confirm air vents, with isolation valves, are installed as per approved drawings.
  5. Check for the installation of water hammer arrestors with isolation valves.
  6. Verify PRVs (Pressure Reducing Valves) are installed as per the drawings.
  7. Ensure backflow preventers are installed in accordance with the approved shop drawings.

Testing and Disinfection

  1. Confirm the piping network has been tested for leaks (1.5 times working pressure for 24 hours).
  2. Ensure network disinfection has been carried out using chlorine as per Method Statement Section 7.9.
  3. Verify that water samples (from the network and tank) are submitted to a third-party laboratory (ITL) for quality testing.

Identification and Sealing

  1. Ensure service identification labels are provided on all exposed pipes and inside access doors.
  2. Check that annular spaces between pipes and sleeves are sealed using approved materials.

Approvals and Sign-Off

For Subcontractor QA/QC:
Date: __________
Name: _____________________
Signature: __________________

For Contractor QA/QC:
Date: __________
Name: _____________________
Signature: __________________

For Consultant Representative:
Date: __________
Name: _____________________
Signature: __________________

1- Water Supply Installation Checklist

Project Location: (Specify Location)
Level: Basement
Work Inspection Request (WIR) No.: (Specify WIR No.)
Section of Work: Water Supply

Setting Out Works

  • Check Layout – Ensure layout is as per the approved drawings.
  • Check Level (MEP/Civil) – Confirm that the level is accurate and in compliance with approved elevations.

Installation Checklist

  1. Confirm that pipe sizes and materials match approved specifications and have been inspected and cleared for installation.
  2. Ensure all flanges are clean and free from debris or contaminants before installation.
  3. Verify that puddle flanges are externally painted with two coats of bituminous paint before being integrated into the structure.
  4. Confirm that sleeves are also clean and free from any debris or contaminants prior to installation.
  5. Make sure the entire installation follows approved drawings and maintains the approved invert levels.
  6. Check that puddle flanges are aligned, and the central plate is exactly vertical using a level indicator.
  7. Ensure that sleeves are aligned, and the central plate is exactly vertical using a level indicator.
  8. For puddle flange pipe pieces, ensure that edges are properly prepared and cleaned before welding, and check alignment and position.
  9. Secure the puddle flange with suitable wires to the reinforcement steel to prevent any displacement during concreting.
  10. Perform a final check of the installation before closing the shuttering.

QA/QC Sign-Off

Subcontractor QA/QC:
Name: ____________________
Sign: ____________________
Date: ____________________

Contractor QA/QC:
Name: ____________________
Sign: ____________________
Date: ____________________

Consultant Representative:
Name: ____________________
Sign: ____________________
Date: ____________________

2- Cold Water Piping System (Underground) Checklist

Form No:
Revision No: 0
Page: 1 of 1

Project Details

  • Subcontractor:
  • Contractor:
  • Section of Work: Water Supply
  • Location:
  • Level:
  • WIR No.:

Stage 1: Setting Out

  • Verify layout has been checked and marked appropriately.
  • Confirm clearance from other MEP and civil services.
  • Ensure excavation has been completed as per approved drawings.
  • Confirm suitability of backfilling and compaction before installation.

Stage 2: Installation Checks

  1. Ensure all pipe routings and sizes conform to approved shop drawings.
  2. Verify that all materials used are as per the approved material submittals.
  3. Check the bedding surface to ensure it is free from hard protrusions or large stones and is properly prepared.
  4. Confirm that the installed pipe levels and slopes match the approved drawings.
  5. Verify that pressure testing of pipes has been completed (1.5 times working pressure for 24 hours).
  6. Ensure that all open pipe ends are sealed to prevent ingress of construction debris.
  7. Confirm that pipe expansion provisions are made at building expansion joints and other required locations.
  8. Check that approved detectable warning tapes are installed at the required level above the piping.

Approvals and Sign-Off

  • Subcontractor QA/QC
    • Name:
    • Signature:
    • Date:
  • Contractor QA/QC
    • Name:
    • Signature:
    • Date:
  • Consultant Representative
    • Name:
    • Signature:
    • Date:

3- Checklist for Testing of Water Supply Piping System and Accessories:

Hydrostatic Test Report

Ref. No:
Revision No: 0
Page: 1 of 1

Project Details

Subcontractor:
Contractor:
Section of Work: Water Supply
Location:
Level:
Work Inspection Request (WIR) No.:

Test Information

Area / Location:
System: Water Supply
Drawing No.:
Drawing Revision:

Type of Test

  • Test Method: Hydrostatic Test ✔
  • Test Medium: Water ✔

Piping System

  • Hot and Cold Water Supply Pipe Work

Test Parameters

  • Working Pressure:
  • Test Pressure: 1.5 × Working Pressure
  • Minimum Ambient Temperature:
  • Test Medium Temperature:
  • Date of Test:
  • Duration of Test: Minimum 2 Hours
  • Testing Fluid/Gas: Water
  • Start Time:
  • Finish Time:
  • Initial Pressure:
  • Final Pressure:
  • Pressure Gauge Number:
  • Calibration Due Date:

Remarks

(Insert observations, notes, or specific remarks about the test here)

Test Results

☐ No leaks were observed during the test duration. Test results are acceptable.
☐ Test results are not acceptable. Rectify leaks and retest.

Sign-Off and Approval

Subcontractor QA/QC:

  • Name:
  • Signature:
  • Date:

Contractor QA/QC:

  • Name:
  • Signature:
  • Date:

Consultant Representative:

  • Name:
  • Signature:
  • Date:

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