Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements Section 09: Building Works  23 of 24 9.2.15.4 Wash Basins  9.2.15.5 Showers  9.2.15.6 Sinks  9.2.16 Testing of sanitary systems  9.2.17 Pressure tests of drainage  9.2.18 Pressure tests of water supply pipes  The wash-basins shall be of vitreous china, wall hung and in white colour. The wash-basins shall be  provided with a waste connection, piped water supply, overflow outlet, plug and chain and water taps.  The wash-basin shall be designed to eliminate splashing and spillage. All exposed metalwork shall be  chrome plated. The wash-basin shall be supported by wall brackets of painted steel firmly fixed to the  wall. Each basin shall form a waterproof edge with the wall. A mirror of approximately 40 x 60 cm  shall be provided and fixed above each washbasin.  Showers shall be fixed complete including piped hot and cold water supply, wall mounted taps and  floor drains. All shower rooms shall be provided with a built-in soap holder and a shower curtain rail.  The floor in the shower rooms shall be provided with a sill.  The sink-units shall be manufactured of stainless steel and each sink shall be formed in one piece.  The sinks shall be provided with a single drainer, including plugs and chains, wastes and traps, piped  water supply and taps. The sinks shall be provided with suitable built-in pipework, taps and fittings  shall be chromium plated.  The sanitary system shall not be accepted until it has been tested as specified below. All tests shall be  conducted in the presence of the Engineer. No part of the sanitary system shall be painted, covered or  enclosed until it has been tested, inspected and accepted. All equipment, materials, instruments and  labour necessary for testing and inspection shall be provided by the Contractor, to execute the work as  directed.  The piping of the plumbing and drainage system shall be tested with water. After the plumbing fix- tures have been set and their traps filled with water, the entire drainage system shall be submitted to a  final test. The water test shall be applied to the drainage system in its entirety or in sections. If applied  to the entire system, all openings in the piping shall be tightly closed, except the highest opening, and  the system filled with water to the point of overflow. If the system is tested in sections, each opening  shall be tightly plugged except the highest opening of the section under test. Each section shall be  filled with water but no section shall be tested with less than 3 metres head of water.  The Contractor has to install temporarily a pipe of 3 metres height in order to apply 3 metres head at  the uppermost sections of the system. The water shall be kept in the system, or in the portion under the  test, for at least 4 hours before inspection starts. The system shall then be tight at all points.  Underground sewers outside the building shall be tested by plugging the end of the sewer pipe filling  with water, and testing with not less than 3 metres head of water.  Upon completion of the potable water distribution system, it shall be tested and proved tight under a  water pressure of 10 bar or 150% of the working pressure, whichever is higher. Care shall be taken  that no appliance or fitting shall be pressurised higher than its rating. If such an appliance is included  in the testing circuit, it shall be blinded prior to applying the pressure. A hand pump shall be used for  9_Vol3_d4.3_Section 9 building works_en_GIR_rev6.docx 