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<h3>Licenced service personnel</h3>
<table>
    <thead>
        <tr>
            <th>Types of Work</th>
            <th>Licenced Person Required</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Water service and sanitary works</td>
            <td>Have to engage a Public Utilities Board (PUB) Licensed Plumber</td>
        </tr>
        <tr>
            <td>Gas service works</td>
            <td>Have to engage a Energy Market Authority's (EMA) licensed gas service worker</td>
        </tr>
    </tbody>
</table>
<p>* From 1 April 2018, only PUB Licensed Plumbers will be allowed to carry out water service and sanitary works. You can engage a handymen (without PUB licence) for simple plumbing works.</p>
<h3><strong>Ramsets/ nails/ screws</strong></h3>
<p>Ramsets/ nails/ screws used must not exceed 6mm in diameter and 40mm in penetration depth for all types of flats.</p>
<h3>Inspection opening</h3>
<p>An inspection opening for future maintenance must be provided for installation of bathtubs. Weep holes must also be provided in the installation of bathtubs and shower trays.</p>
<h3><strong>Precautionary measures</strong></h3>
<p>For flats provided with concealed water pipes (originally provided by HDB), precautionary measures should be taken when drilling into walls:</p>
<ul>
    <li>The concealed water pipe layout plans for <a href="/-/media/managing-my-home/renovation-and-maintenance/renovation/renovation-guidelines/water-and-sanitary-plumbing-works-and-gas-works/concealed-piping-for-kitchen.pdf" target="_blank">kitchen</a> (PDF, 207KB) and <a href="/-/media/managing-my-home/renovation-and-maintenance/renovation/renovation-guidelines/water-and-sanitary-plumbing-works-and-gas-works/concealed-piping-for-toilet.pdf" target="_blank">toilet</a> (PDF, 255KB) should be used only as a guide</li>
</ul>

Technical terms and conditions

<table>
    <thead>
        <tr>
            <th>Types of Work</th>
            <th>Subject to the Following Guidelines/ Conditions</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Replacement of existing sink with stainless steel/ enameled type</td>
            <td rowspan="2">Not applicable</td>
        </tr>
        <tr>
            <td>Replacement of existing wash basin with coloured type</td>
        </tr>
        <tr>
            <td>Repositioning of kitchen sink supported by 63mm thick hollow walls with tiled finish</td>
            <td>
            <ul>
                <li>Thickness of dapoh slab inclusive of finishes should not exceed 50mm</li>
                <li>Floor slab must not be tampered with</li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Repositioning of sink or wash basin</td>
            <td>
            <ul>
                <li>Floor slab must not be tampered with</li>
            </ul>
            </td>
        </tr>
    </tbody>
</table>

Sinks and wash basins 

<table>
    <thead>
        <tr>
            <th>Types of Work</th>
            <th>Subject to the Following Guidelines/ Conditions</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Installation of shower screen</td>
            <td>
            <ul>
                <li>Floor slab must not be tampered with</li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Installation of long bath</td>
            <td>
            <ul>
                <li>Extension of toilet to accommodate the long bath is not allowed</li>
                <li>Void area beneath long bath cannot be filled with cement mortar or other materials</li>
                <li>The void underneath must be kept</li>
                <li>Provide inspection opening for future maintenance</li>
                <li>Weep holes must be provided</li>
                <li>Floor slab must not be tampered with</li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Installation of shower tray</td>
            <td>
            <ul>
                <li>Void area beneath shower tray cannot be filled with cement mortar or other materials</li>
                <li>Weep holes must be provided</li>
                <li>The void underneath must be kept</li>
                <li>Floor slab must not be tampered with</li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Installation of spa pool</td>
            <td>
            <ul>
                <li>Spa pool must be purchased ready-made from the market</li>
                <li>Construction of spa pool using bricks/ hollow blocks is not allowed</li>
                <li>Spa pool is to be installed only within bathroom/ toilet originally provided by HDB</li>
                <li>Total weight inclusive of spa pool, water, motor and other accessories must not exceed 400kg</li>
                <li>Floor slab must not be tampered with</li>
                <li>Provide proper water drainage for the spa pool</li>
            </ul>
            </td>
        </tr>
    </tbody>
</table>

Bath and shower

<table>
    <thead>
        <tr>
            <th>Types of Work</th>
            <th>Subject to the Following Guidelines/ Conditions</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Replacement of squat pan with new squat pan and pedestal pan with new pedestal pan</td>
            <td>
            <ul>
                <li>Removal of vent pipes (if any) is not allowed</li>
                <li>Installing, fixing, replacing or removing a toilet pan (WC), and sealing up the discharge pipe shall be carried out by a PUB Licensed Plumber </li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Installation of pedestal and squat pan at wash area on lower floor of executive maisonette</td>
            <td>
            <ul>
                <li>Holes cannot be hacked on the existing floor slab</li>
                <li>Removal of vent pipes (if any) is not allowed</li>
                <li>Installation must follow the <a href="/-/media/managing-my-home/renovation-and-maintenance/renovation/renovation-guidelines/water-and-sanitary-plumbing-works-and-gas-works/pedestral-pan.pdf" target="_blank">Alteration and Addition (A&amp;A) guidelines for pedestal pans</a> (PDF, 305KB) and <a href="/-/media/managing-my-home/renovation-and-maintenance/renovation/renovation-guidelines/water-and-sanitary-plumbing-works-and-gas-works/squat-pan.pdf" target="_blank">squat pans</a> (PDF, 296KB)</li>
                <li>Installing, fixing, replacing or removing a toilet pan (WC), and sealing up the discharge pipe shall be carried out by a PUB Licensed Plumber </li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Replacement of squat pan with pedestal pan</td>
            <td>
            <ul>
                <li>Holes cannot be hacked on the existing floor slab</li>
                <li>Removal of vent pipes (if any) is not allowed</li>
                <li>Installation must follow the <a href="/-/media/managing-my-home/renovation-and-maintenance/renovation/renovation-guidelines/water-and-sanitary-plumbing-works-and-gas-works/drawing5.pdf" target="_blank">A&amp;A guidelines for pedestal pans</a> (PDF, 19KB)</li>
                <li>Installing, fixing, replacing or removing a toilet pan (WC), and sealing up the discharge pipe shall be carried out by a PUB Licensed Plumber </li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Replacement of pedestal pan with squat pan</td>
            <td>
            <ul>
                <li>Holes cannot be hacked on the existing floor slab</li>
                <li>The minimum ceiling height from finished raised floor slab is 2.2m</li>
                <li>Removal of vent pipes (if any) is not allowed</li>
                <li>Installation must follow the <a href="/-/media/managing-my-home/renovation-and-maintenance/renovation/renovation-guidelines/water-and-sanitary-plumbing-works-and-gas-works/drawing6.pdf" target="_blank">A&amp;A guidelines for squat pans</a> (PDF, 42KB)</li>
                <li>Installing, fixing, replacing or removing a toilet pan (WC), and sealing up the discharge pipe shall be carried out by a PUB Licensed Plumber </li>
            </ul>
            </td>
        </tr>
    </tbody>
</table>

Toilet pan

<table>
    <thead>
        <tr>
            <th>Types of Work</th>
            <th>Subject to the Following Guidelines/ Conditions</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Replacement of existing PVC water pipe with copper/ stainless steel pipe</td>
            <td>
            <ul>
                <li>Must comply with PUB requirements</li>
                <li>Installing, fixing, altering, replacing or removing any discharge pipe, discharge stack, ventilating pipe, ventilating stacks or water pipes shall be carried out by a PUB Licensed Plumber </li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Diversion of sink waste pipe</td>
            <td>
            <ul>
                <li>Pipe must not be embedded in floor slab</li>
                <li>Pipe can be embedded within floor finishes</li>
                <li>Must comply with PUB requirements</li>
                <li>Installing, fixing, altering, replacing or removing any discharge pipe, discharge stack, ventilating pipe, or ventilating stacks shall be carried out by a PUB Licensed Plumber </li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Enclosure/ encasement of service ducts/ piping (excluding gas pipe) using lightweight non-combustible materials</td>
            <td>
            <ul>
                <li>Need to provide minimum removable access opening of 600mm x 600mm for inspection and maintenance as the small opening may not allow for total replacement of pipe</li>
                <li>In the event a total replacement of service ducts/piping is required, the enclosure/encasement will have to be removed at the flat owner's own cost</li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>*Concealed waste/ water pipes in floor finishes/ wall</td>
            <td>
            <ul>
                <li>Floor slab and wall must not be tampered with</li>
                <li>Must comply with PUB requirements</li>
                <li>Installing, fixing, altering, replacing or removing any discharge pipe, discharge stack, ventilating pipe, ventilating stacks or water pipes shall be carried out by a PUB Licensed Plumber </li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>*Concealed air-conditioner discharge pipe in floor finishes</td>
            <td>
            <ul>
                <li>Floor slab must not be tampered with</li>
                <li>The pipe must be concealed within the floor finishes only</li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Removal of surface-run water pipes</td>
            <td>
            <ul>
                <li>Must comply with PUB requirements</li>
                <li>Works must be carried out by a PUB Licensed Plumber</li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Removal of surface-run portion of the concealed hot and cold water pipes</td>
            <td>
            <ul>
                <li>Must comply with PUB requirements</li>
                <li>Engage a PUB Licensed Plumber</li>
                <li>The pipes are to be terminated with compression fitting capping with at least 50mm length protruding from the wall</li>
            </ul>
            </td>
        </tr>
    </tbody>
</table>
<p class="RTE_FootnoteLabel">*Such work is discouraged as it may cause water leakage to lower floor unit if the work is not properly carried out.</p>

Pipes

<table>
    <thead>
        <tr>
            <th>Types of Work</th>
            <th>Subject to the Following Guidelines/ Conditions</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Enclosure/ encasement of gas riser pipe using lightweight non-combustible materials</td>
            <td>
            <ul>
                <li>Need to provide a fully ventilated removable access (600mm width and full height from ceiling to floor) for inspection and maintenance of gas riser pipe</li>
                <li>In the event a total replacement of piping is required, the enclosure/encasement will have to be removed at the flat owner's own cost</li>
                <li>All gas riser pipes including riser branch pipe (before sub-meter) must not be tampered with</li>
                <li>All gas pipes must NOT be embedded in the common partition walls</li>
                <li>Space with gas pipes are therefore not allowed to be converted to bedrooms</li>
                <li>All gas pipe alteration works must be carried out by City Energy Pte Ltd or an Licenced Gas Service Worker (LGSW)</li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Relocation of gas meter</td>
            <td>
            <ul>
                <li>Works must be carried out by City Energy Pte Ltd</li>
                <li>Need to comply with Singapore Civil Defence Force&rsquo;s (SCDF) guidelines</li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Removal of gas branch pipe (after sub-meter)</td>
            <td>
            <ul>
                <li>A 100mm length of gas pipe protruding from the wall into the kitchen must be maintained and capped when not in use</li>
                <li>Works must be carried out by City Energy Pte Ltd or a LGSW</li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Installation of gas water heater/ gas oven</td>
            <td>
            <ul>
                <li>Compliance with City Energy Pte Ltd's requirements</li>
                <li>Engage a LGSW for the works</li>
                <li>Outdoor installation is subject to HDB's approval</li>
            </ul>
            </td>
        </tr>
        <tr>
            <td>Installation of gas pipes/ appliances within flat</td>
            <td>
            <ul>
                <li>Gas pipe termination or installation of gas appliances are not allowed in sleeping areas/ bedrooms</li>
                <li>A full-height wall must be erected to separate the sleeping area/ bedroom from the gas pipes/ gas appliances. For example, if gas pipes and gas appliances are installed in the kitchen of a 2-room Flexi flat or White flat, where the flexible space is used as a sleeping area/ bedroom, there must be a full-height wall with a door that separates the kitchen from this space.</li>
            </ul>
            </td>
        </tr>
    </tbody>
</table>

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