Supply and Replacement of Domestic Water Zone Control Valve System (1st floor to 17th floor)Supply and replacement of 3” heavy duty butterfly valve # 14 no’sSupply and replacement of 3” PRV (Pressure Reducing Valve PN16 flanged) # 7 No’sSupply and replacement of 3” DRV # 7 No’sSupply and replacement of pressure gauges' as req...