I am happy with the service which is given by Sri Ram Aqua Tech Valasaravakkam, Chennai. My Aquaguard brand 25 liters water purifier needs to be installed. So I have called to this service centre for service along with AMC also. They have sent the 1 technician for installation and AMC. The technician is good at work and quoted Rs 4150 for Installation RS 150 and RS 4000 for AMC service.