The plumbing for my whole house is completed but barely a month, there are visible patches of rust on the pipes.

Is this common?

The plumbing for my whole house is completed but barely a month, there are visible patches of rust on the pipes.

Is this common?

this is not rust... actually stainless steel piping originally will have stains like this. if you want shiny surface, you need to do some chemical washing before that.

this is what i learn in my industry....

this is not rust... actually stainless steel piping originally will have stains like this. if you want shiny surface, you need to do some chemical washing before that.

this is what i learn in my industry....

icic. But i do not see that in my current house of 20 years, nothing has been done and it does not have patches like that..hmm..