This document defines the methods to use to ensure that the works at construction site are in compliance with the approved designs and approved materials. This method statement describes the procedure for installation of sanitary wares.
Scope of Document
This document applies to the inward site inspection, installation and inspection methods to be adopted for the installation of sanitary wares.
The work methods are divided as follows in five major steps:
- Preparation of the Works
- Delivery and inspection of Sanitary Ware materials upon delivery at site
- Setting out of works
- Installation of Sanitary Wares
- Inspection of Sanitary Wares
Mandatory Equipment
- PPE for all staff and labor
- Measuring tape and setting out markers
- Electric Drill hammer
- Pipe Fitters tool box
- Step Ladder / Scaffolding
Responsibility of Job at Site
The Project Manager is the overall responsible person for the process implementation of the works. The Construction Manager/Site Engineer will be responsible for all construction activities at the site and will directly supervise through erection supervisor/ skilled workmen / the work at site.
The Site Engineer will be responsible for arranging and controlling the inspection and testing activities.
Furthermore, it is the responsibility of each individual employed in the project to take due care to ensure their own personal safety and that of their work colleagues.
Preparatory installation requirements
Prior to installation of Sanitary Wares, the supervisor and foreman will verify and ensure that all the safety requirements have been complied with and are in place.
The supervisor will verify that all relevant approved latest revisions of shop drawings, technical submittals, inspection and test plans are in the work place for installation reference. This also includes installation procedures.
The supervisor and foreman will inspect all the materials delivered to the work place and ensure that these are the required materials and also check for any damage or defect.
Any materials found not as per requirement or with damage or defect will be set aside. These will be properly labeled and returned to the warehouse. These will also be reported in a non conformance report to the QA/QC Engineer.
All material shall be stored under protection dust free area in a covered and ventilated store.
All materials will be stored in packing as per manufacturer’s recommendations. Packing shall be removed only prior to installation to avoid damages and dust accumulation.
All material will be shifted by manpower using manual handling technique to work place.
The supervisor and foreman will orient and familiarize all the plumbers and labors involved in the installations regarding the relevant approved shop drawings, technical submittals, installation procedures and details, acceptance criteria and safety requirements.
The supervisor and foreman will examine surfaces to receive sanitary wares for compliance with installation tolerances and other required conditions, as described in the installation requirement. Installation will not proceed until unsatisfactory conditions have been corrected.
All installation / Construction / testing works shall be carried out in compliance with the contract specifications and project safety manual.
Resources Mobilization Plan
According to the work program, and planned site access availability at the respective work sites,appropriate staff, labor,equipment and materials will be mobilized to the site to install water supply system in accordance with the approved shop drawing and material submittal.
The actual mobilization of staff, labor and equipment and the materials delivery schedule will be dependent on site access.
Aspects of mobilization of the various resources are described in detail in the following sections of this method statement
Health & Safety Requirements
Proper safety harness to be used and secured, if required.
All personal protective equipment shall be used as appropriate according to the nature of the job.
Housekeeping shall be of good standard and all cut materials and debris shall be removed.
Installation Process of Sanitary Wares
Ensure that materials are as per approved material submittals.
It shall be ensured that the materials that are provided by main contractor are in good condition.
The sanitary wares shall be properly cleaned prior to commencement of installation.
Installation of sanitary ware shall be in line with specification requirement, approved materials, and approved shop drawings, manufacturer recommendations and coordination with civil work.
Prior to installation, make sure that all drainage pipes already tested and inspected by consultant.
The mounting brackets / accessories supplied with the sanitary wares shall be as per approved materials & shall be properly utilized and installed as per recommendations of manufacturer.
Installation of WC with Concealed Cisterns
Drainage & water supply pipe work should be inspected and tested prior to the installation of water closet.
Water closet extension piece, connectors, fittings & accessories from main contractor should be as per manufacturer standards.
WC brackets & cisterns from main contractor should be properly installed and fixed prior to the closure of stud wall or shaft.
WC should be checked from any damage, scratches & defects prior to installation.
Install the wall mounted WC once the clearance & access already provided by the main contractor (stud wall, wall tiles or wall mirror already fixed) following the approved elevations & details.
Refer to the approved shop drawings.
Secure all the fixing accessories like nuts, washers, gaskets from manufacturer, cover and seats.
Cover the wc with plastics or cartons and provide with cordons & signage till testing and commissioning
Installation of Wash Basin
Drainage & water supply pipe work should be inspected and tested prior to the installation of wash basin.
Wash Basin extension piece, connectors, fittings & accessories from main contractor should be as per manufacturer standards.
Marble Counter for wash basin with steel support to be provided & installed by other trade following the requirement (opening & dimension) of the wash basin.
Any discrepancy from the wash basin requirement to be coordinated to main contractor for modification.
Wash Basin should be checked from any damage, scratches & defects prior to installation.
Install the Wash basin once the clearance and access already provided by the main contractor (counter with 20mm plywood by others already fixed and hole for mixer already provided) following the approved elevations & details. Refer to the approved shop drawing.
Silicon sealant to be provided in between the wash basin’s rim & the counter.
Secure all the fixing accessories like nuts, washers & gaskets from manufacturer & single hole mixer. Wash basin to be secure by clamping the rim to the underside of the counter.
Install the hot & cold water supply (escutcheons, angle valves & chrome plated tubes)
Install 32 dia. waste pipe to siphon bend with gasket flushed on the wall from bottle trap.
Cover the wash basin with plastics or cartons and provide with cordons & signage till testing and commissioning.
Wall hung fixtures mounting heights to be followed as per approved shop drawings.
Installation of urinal and urinal partition shall be as per approved shop drawing.
Drain connection and water connection to urinal shall be as per manufacturer recommendation and approved shop drawings.
Urinal flush valve shall be fixed in accordance with the tile layout and shall be connected to urinal water supply pipe.
The ablution hand spray shall be fixed to the water supply pipes as per the locations indicated in approved tiling layout.
The installation of containment & cables & wires for electronic faucets & flush valves if required shall be carried out as per approved method statement, for installation of conduits & installation of cable and wires.
The janitor sink mixer and shower mixer and kitchen sink mixer shall be fixed to water supply pipes as per location mentioned in the shop drawings.
Inspection and Testing
In process works shall be monitored for quality of workmanship and installation against approved construction drawings by the relevant Site Engineer, Supervisor and OA/QC Engineer.
On satisfactory completion of the installation works, an internal inspection will be carried out to ensure correct installation as per approved drawing, specifications & method statement notify the main contractor / consultant in advance at least 24 hours prior to offering for Consultant’s inspection.
Rectify any installation defects and resubmit for approval.
Inspection Checklist for Sanitary Ware Installation
Check the material used for installation is approved,correct type & size
Make sure the installation as per approved shop drawing & manufacturers recommendation
Check the elevation and orientation are correct
Check the installation is perpendicular or horizontal to wall in neat manner
Ensure there is no damage, scratches & defects etc.
Check if access panel is provided for WC concealed cistern for inspection & maintenance purposes
Check outer periphery of the sanitary wares is seal using approved silicon sealant.
Relevant Mandatory Documents
- Design Drawings
- Shop Drawings
- Materials submittals
- ITP
- Risk Assessment