tender for providing annual service maintenance to reverse osmosis plant at zone - ii; 1 operation and maintenance of routine service reverse osmosis system once in a month and twelve times in a year of tambaram city municipal city municipal corporation zone - iiin different various places following capacity of (2000,1000, 500 amad 250 litre per hour) plants. the service maintenance cost are included for each plant compulsory replacement of 10 micron and 5 micron spun filters, regular service for sand and carbon filter, multiport valve replacement, high & low pressure switch, high pressure pump impeller servicing, membrane cleaning by chemicals, needle valve, wet control panel, electrical control, back washing auto flush solenoid replacement, high pressure switch, automatic control system float, sediment filter for ro plant, all types of boosting pump, stain filter, activated carbon filter, membrane, raw water bearing change, adapter, pump servicing excluding high pressure pump if necessary above components replacing etc. complete. 2 2000 lph capacity 3 1000 lph capacity 4 500 lph capacity 5 250 lph capacity