water heater flue pipe

Hi Everyone, We are in a 2 year old house. Every time the water heater turns on we hear loud knockings sound in the attic. We were able to find the pipe causing it - It's the flue pipe coming out of the water heater on the 1st floor and going upto the attic and having the exhaust out. The pipe...

My inspection report came back that my PVC & Polyethylene water lines are installed too close to the water heater flue pipe. I am trying to put together an estimated cost of repairs for the seller. Thank you!