New construction floor in a residendial aprtment complex. Hot water tab to the existing hot water tank. The tank is located on the roof 270 feet abouve the new construction. The feed and return hot water pipes that was ran vibrates and cause a loud noise on the construction floormecanical room.

HI Chester

What type of tubing?

What size hot water pipe are we talking about?

What kind of shutoffs inline and how many?

What kind of water heating system (boiler, water heater/storage tanks, etc.)?

How many (if any) expansion joints are installed on the long vertical runs?

How about the hangers... any of them so tight they aren't allowing for expansion and contraction?

Does the pipe make contact going through the floors/walls?

Let me know more...

Mark