Multi-storied building constructed . Builder should comply strictly with approved plan for drainage system. Discharge of effluent . Permission by Municipality to connect sewerage pipe line of disputed construction to under ground municipal pipe line is illegal. There is an absolute liability on the part of those who are engaged in construction work , particularly of multistoried structures , not to commit nuisance by letting out effluent from their drainage system. [ M/s. Ajay Constructions vs Kkateeya Nagar. AIR 1991 AP 294. Sardar Ali Khan and M.N.Rao (JJ) ]