Tender For operation & maintenance of iei & fans, pumpsets, street lights, dg sets, transformer & 11 kv substation, fire alarm system, lifts, ro plant system, solar water heating system at hostels & maintenance of residential & non-residential buildings at niphm, rajendranagar, hyderabad. sh: replacement of 1500 lpd solar water tanks at hostel & servicing of solar flat collector panels at niphm, rajendranagar, hyderabad.