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Translate PDF. In all circumstances, it is the responsibility of the applicants, Authorised Persons and Licensed Plumbers to ensure that the applications comply with the statutory requirements and the requirements of the Water Authority. This book is compiled by the Water Supplies Department to serve as a handy reference only. It is therefore important for the applicants, Authorised Persons and Licensed Plumbers to refer to the original publications and to make reference to the latest information on new or modified requirements issued by the Water zyxwvutsr Authority and relevant British Standards before they submit their applications.
In case there is any discrepancy between the original publications and this book, the original publications should take precedence. March 1. General 1. Communal Service That part of a fire service or inside service which is used in common by more than one consumer in the same premises. Connexion to the Main The pipe between the main and the control valve which is nearest to the main and which regulates the flow of a supply from the main into a fire service or inside service, such control valve and all fittings between such control valve and the main.
Consumer A person who is approved under Section 7 of Waterworks Ordinance as a consumer of a fire service or inside service. Direct Supply System A plumbing system which conveys water directly from the government water mains to the point of usage without any transit water storage tanks. Fire Service The pipes and fittings in premises, and any pipes and fittings between the premises and a connexion to the main, which are used or are intended to be used for a supply solely for the purposes of fire fighting.
Fitting Any apparatus, cistern, cock, equipment, machinery, material, tank, tap and valve; and any appliance or device other than a meter, which is installed or used in a fire service or inside service.
Indirect Supply System A plumbing system which conveys water from the government water mains to the point of usage through a transit water storage tank.
Inside Service The pipes and fittings in premises, and any pipes and fittings between the premises and a connexion to the main other than the pipes and fittings forming part of a fire service which are used or are intended to be used for the purposes of a supply. Licensed Plumber A person licensed under the Waterworks Ordinance to construct, install, maintain, alter, repair or remove fire services or inside services.
Meter An appliance or device owned by the Government and maintained by the Water Authority for the purpose of measuring water consumption. Premises Any building or structure or any part thereof and any place in which there is a fire service, inside service or any part of the waterwork; or in which a fire service or inside service is intended to be constructed or installed. Water Authority The Director of Water Supplies Waterworks Any property occupied, used or maintained by the Water Authority for the purpose of water supply, including all water gathering grounds.
Ball Valve a valve that controls the entry of water into a storage cistern or flushing cistern, closing off the supply when the water level in the cistern has reached a predetermined level. Boiler an enclosed vessel in which water is heated by the direct application of heat Butterfly Valve a valve in which a disc is rotated about a diametric axis of a cylinder to vary the aperture. It is used where space is limited or more sophisticated control is required.
Calorifer a storage vessel, not open to the atmosphere, in which a supply of water is heated. The vessel contains an element, such as a coil of pipe, through which is passed a supply of hot water or steam, in Expansion Vessel Float Switch such a way that the two supplies do not mix, heat being transferred through the walls of the element. It is used where the water pressure is low and on distribution pipework from a storage cistern.
This valve is sometimes referred to as a fullway gate valve because when it is fully open, there is no restriction of flow through the valve. Loose Jumper Type a screwdown pattern valve with horizontal inlet and outlet Stopcock connections. It incorporates a loose jumper valve permitting flow in one direction only. It is used for isolating the supply of water in a high pressure pipeline. It is also known as check valve. Pressure Reducing Valve a valve that reduces the pressure of a fluid immediately downstream of its position in a pipeline to a preselected value or by a predetermined ratio.
If the meter is stolen or damaged communal services. As far as practicable, it is advised that the communal service should not be run through the individual premises because access to the communal service for routine inspection, maintenance and repair of the communal service may be restricted and obstructed by individual premises. Application for New Water Supply 3. Approval from the Water Authority is required in order to construct, install, alter or remove a plumbing installation.
Plumbing installation that is not to receive water supply from the Waterworks does not need the approval of the Water Authority. However, it is advisable for the plumbing installation to follow the Waterworks requirements such that when a supply from the Waterworks becomes necessary, the modification of the plumbing installation to comply with the Waterworks requirements will be minimized.
The OSC is an option in addition to the existing channels of application. The guidelines help the above people to understand the installation requirements and application procedures associated with the installation, operation and maintenance of the aforesaid solar water heating system. Submissions 3. The Water Authority will as far as practical provide the information to the applicant such as location and size of connection points, water pressures, single or WSD pledges to vet submissions of plumbing proposals for new building developments in 20 working days.
Sometimes it may take a longer time for the applicant to clarify on points not clearly mentioned in the proposal. Therefore, it is advisable for the applicant to submit the plumbing proposal to the Water Authority for approval early in order not to delay the plumbing works.
No plumbing work shall commence before the plumbing proposal has been approved by the Water Authority. It is important for the applicant to bear in mind the need to accommodate all the inside service and fire service, which include water storage tanks, break pressure tanks, meter rooms etc.
Replumbing Works Prior to carrying out replumbing works within private buildings, approval from the Water Authority must be sought. Failing this is in contravention of Section 14 of the Waterworks Ordinance and the offenders are liable to prosecution. In our approval to the application for replumbing works, the licensed plumber will be invited to carry out the meter replacement works and our District staff will inform the licensed plumber of the detailed arrangement.
Format One set of the plumbing proposals is required. For revised drawings, details of all the amendments shall be listed as notes to the drawings and the amendments shall also be highlighted or coloured in the drawings for easy identification. The submission, whether approved or not, will not be returned to the applicant. Once approved, no details in the submission shall be altered without the written approval of 3.
The Water Authority from time to time reviews the target response time to look for improvements. Under March the Ordinance, a fee is required for the excavation permit. To recover the cost, the Water Authority will issue an additional and separate demand note on the estimated excavation permit fees to applicants. This demand note is subject to adjustment according to the actual final excavation permit fees incurred for the work.
Part I shall also be signed by the Authorized Person for new building project. The licensed plumber and the Authorized Person if applicable shall certify that the pipes and fittings to be installed and any materials to be used for the construction, installation, alteration or removal construction etc. Before commencement of plumbing works, when signing Form WWO 46, the licensed plumber should take all necessary steps to ensure that the pipes and fittings to be installed and any materials to be used shall be as prescribed by the Waterworks Regulations.
WWO46 form should be in A4 size. The original will be disposed of and will not be returned to the LP. This needs to be done before staff of the Water Authority conducts inspection.
Interim Inspections and Final Inspections After completion of plumbing works, the licensed plumber concerned is required to report completion to the Water Authority and requests the Water Authority to inspect the completed works via the submission of Form WWO46 Part IV. The inspection will be an interim inspection when the completed works are only part of the plumbing works such as underground pipeworks or an inside service or a fire service to be concealed.
On the other hand, when the completed works are the whole of the plumbing works, the inspection conducted by the Water Authority will be a final inspection. The interim inspection will be carried out on a random basis and applied a risk based approach. Completion of Work xtsnige After completion of plumbing works, the licensed plumber should report completion of work on Part IV of Form WWO 46 and request the Water Authority to arrange for final inspection.
Furthermore, neither the approval of the plumbing proposals nor the granting of the connection to the main and the installation of the part of the fire service or inside service on land held by the Government shall be construed as a ratification of any contravention of any of the provisions of the Waterworks Ordinance or the Waterworks Regulations.
For details, please refer to the website of 4. Generally, works of a minor nature are works which can be completed without the involvement of specialised trade skill that requires specific knowledge and ability acquired through designated training for carrying out the works, and those which do not change the general arrangement of the plumbing installation already approved by the Water Authority, or affect the flow conditions of the plumbing system thus causing possible supply problems.
The following minor alterations and repairs to inside services without dismantling and reinstallation of the water meter within a domestic premises may be exempted as follows:- i Replacement of defective piping, taps, stopcocks, gate valves, ball valves and work of a similar nature. Minor alterations and repairs to inside services shall conform to waterworks requirement in respect of quality of workmanship and material. For the avoidance of doubt, all plumbing works using soldering for connecting copper pipes shall have the permission of the Water Authority and shall be undertaken by a licensed plumber in accordance with Section 14 and 15 of WWO.
As alterations, addition and extension to the existing plumbing installation may cause a change in the flow conditions in one way or another, it is in the interest of the 4. The addresses and office hours of Customer Enquiry Centres are: 1. Metering 5. General Metering is required to measure water consumed for billing purposes. Meter position shall be provided by the LP employed by the applicant for meter installation while water meters will be provided by the Water Authority.
Water meters may be installed either by the Water Authority or the licensed plumber. The size and location of the water meter will be determined by the Water Authority. For domestic supply, a meter size of 15mm is usually recommended. For trade and industrial supply, the meter size is determined based on the actual water consumption. Meter Position The meter position for a 15 mm diameter meter shall be constructed to include 20 mm x 15 mm bushes at both sides of the meter position with a mm clear effective length distance piece of 15 mm tube placed in between refer to Fig 3.
The tube shall be hollow with conspicuous holes drilled through the body. A long screw connector shall be provided immediately after the bush at the delivery side. The meter position for meter of all sizes shall also be similarly provided with corresponding fittings of appropriate sizes.
All water meters, including vacant meter positions and check meter positions, shall be arranged in groups and housed in meter rooms or meter boxes. Besides, if the door to the meter room is to be opened at an inward position and it is at the opposite side of the meter group, the minimum perpendicular distance between the outward face of the meter group and the door the point on the door that is nearest to the meter group when it is fully opened shall be mm; b the clear width and height of the door entrance to the meter room shall not be less than mm and mm respectively.
The arrangement of the meter position s and the door opening of the meter box shall be arranged in such a c manner that staff of the Water Authority would not be required to lean inwards to take meter readings or carry out maintenance works. The lock of the door to the meter room shall be located at a level between 0. The door to the meter room shall be equipped with handle to facilitate door opening. The door handle shall be either in the form of long cylindrical or spherical shape to facilitate handling.
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