In our neighbor 1 delhi policeman live with his family and always fight with others on any issue related to common road that is not under MCD. There is no sewer line in our area and ionly 1 RCC drainage system at main road that is at the end of our street at around 50 fut. Now, while I tried to join our toilet bathroom connection/pipelines with that main RCC drainage he removed the pipeline being installed by the plumber and he and her wife started quarreling stating that they will not allow to install pipeline because it will create smell whereas I informed them that the pipeline will be covered and chamber will be properly covered and closed. But they did not listen and removed the pipeline with an impression of his being in Delhi police. Moreover, their own bathroom drainage directly come out and spread in from on my house and create mud in the raw street. Earlier too he and her wife stopped my construction work but somehow with compromise and as per their instructions "and not mine" the civil work completed. But, now the issue is connection of drainage of safety tank that they are not allowing. Since there is no sewer line in the area I don't think there would be any issue on MCD side to do so. So, please guide how to get this work complete and legal options to teach lesson to them so that they can not quarrel with other people in impression of being police service.