Bangalore Water Supply & Sewerage Board [Bwssb] — Illegal Connection

Address: House 33 1st Block 2nd Cross Near SVV Convent HMT layout Nagasandra Post banglore 560073

As I have seen the bill from this house never exceeds more than 350Rs which is highly impossible as this house 2 Floors and water usage is also more as they regularly waste the water by cleaning the vehicles.
I have also heard the owner giving suggestions to install a double connection to get less bill (one pipe from the meter and the other directly).
Please do the need .