INSTALLATION WORKS OF 150MM, 300MM, 400MM AND 500MM DIAMETER ALTITUDE VALVE (ALTITUDE VALVE) AS WELL AS RELATED WORKS AT PERMAI HOSPITAL WATER TANK, UDA WATER TANK 2 (JALAN PADI HUMA), TAMAN BUKIT GEMILANG WATER TANK, PASIR GUDANG 1 WATER TANK AND BUKIT SKUDAI WATER TANK FOR JOHOR BAHRU DISTRICT, JOHOR. -