A mounting bracket connects a water pipe fastened to an eared fitting to a support bar in a building. The bracket has an isolator made of a material selected to substantially reduce the transmission of noise and wrapped around the support bar. The bracket has a stiff shell wrapped around a periphery of the support bar and has two opposing ends. The shell is sized to clamp the isolator against the support bar during use as the ends are moved toward each other with sufficient force that there is a tight clamp resulting in little relative movement between the shell and the support during use. The shell has a mounting portion for the eared fitting. The bracket also has a fastening mechanism to hold the ends together and to fasten the eared fitting to the mounting portion during use of the bracket. The fastening mechanism clamps the ends together to restrain relative movement of the shell and support bar. For telescoping support bars an adaptor is interposed between the isolator and the smaller, inner telescoping member of the support bar to make the support bar a uniform size at the location of the bracket.