Mohan Plumbing Services Provides one of the best Drainage Line service in Noida. If you are like most people, you never think about your drainage line. It’s there, it’s an important part of your home plumbing system and if it stays out of sight and out of mind, that is the way it should be, right?But, as with most parts of your plumbing system, things happen. Time is not your drainage line’s friend. Things like greasy gunk and large objects find a way to block your drainage line.