this purpose. All lines shall be properly plugged or capped, making sure that all air has been vented  from the system before pressure is applied. The pressure shall remain constant without pumping for a  period of eight hours.  If any leaks in joints or evidence of defective pipe or fitting are disclosed, the defective work shall be  immediately corrected by replacing defective parts with new joints or materials. No makeshift repairs  or application of patching compounds shall be permitted. After the correction is made, supplementary  tests shall be run until a satisfactory working condition is obtained.  A flow test shall be made of all the sanitary system components and in case any obstructions are en- countered in the piping or equipment, the Contractor shall disassemble, clean, repair and reassemble  such piping or equipment.  A watertight test for sleeves and the passage of pipes through floor and roof shall be made. The Con- tractor shall repair any leaks.  The Contractor shall install hot and cold water plumbing systems, in polypropylene pipes in admin- istration buildings, guard house, workshops, garage, pumping stations gate houses as required.  All other buildings shall be provided by washing water system.  Hot water shall be provided by means of electrically heated and lagged galvanised steel cylinders  (minimum storage capacity 120 litres).  Heating of the Administration building, guard house and all the office rooms in other buildings shall  be made by air conditioners unless otherwise stated in the herewith Employer’s Requirements.  Electricity installations, heating and cooling design drawings shall be presented for the approval of the  Engineer. General specifications of the air conditioners are as follows: Demanded cooling power: 9000 Btu/h, 12000 Btu/h or 18000 Btu/h   9000 Btu/h for a maximum of 25 m² area   12000 Btu/h for a maximum of 35 m² area   18000 Btu/h for a maximum of 50 m² area   Washable antibacterial filter installed   Air conditioner shall confirm the requirements in ISO 9001 and CE standards   Noise level in the inside unit shall be maximum 37 dB(A)   Noise level in the outside unit shall be maximum 55 dB(A)   Power: 220 V – 50 Hz   Air conditioner shall provide 50 % relative humidity at 23ºC.  9_Vol3_d4.3_Section 9 building works_en_GIR_rev6.docx  9.2.21 Heating and Cooling Systems 9.2.20 Hot and cold water plumbing systems  9.2.19 Flow test  24 of 24 Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements Section 09: Building Works 