hi when installing hot water copper pipework in floor joists, what should be done to prevent the possibility of potential noise proplems? is ti A notch the joists to a 1/4 depth, and sleeve the pipe in plastic. B make allowance for expansion and contraction of the pipework. C clip the pipework as it passes over each joist using plastic clips. D lay the pipework to falls to avoid air-locks and pipe vibration. [IMG]http://www.masterplumbers.com/wwwboard/images/smile.gif”> DUNBAR2007-08-24 10:01:05