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Q : Since we have been on higher water pressure from a new source, we get more noise in the pipes. Not banging or clunking, just more water moving through the system faster, sort of a “rushing” noise. The pipe into the house is plastic, then hooks into copper pipe. I am at the point now where I am about prepared to rip the strapping off and putting foam around the pipes before I strap them back up. Before I spend the money on this, I thought I would check with you to see if that’s what I must do, or can you suggest something else ? Thanks very much.

A: A reduction of 1.5:1 ( sometimes 3/4″ to 1/2″ is sometimes used to extend or maintain water pressure throughout a house. The idea is that, given constant supply pressure, proscribing volume will increase velocity. Released pressure at a fixture will be compensated for by this increased velocity.

What diameter is the plastic feed? If the reduction is greater than 1.5:1 it’s quite likely that the velocity is great enough to cause noise in the pipe.

Check that all the shut-off valves (below the sinks for example. ) are absolutely open. Also, check all the pipes to see if there are any crushed or dented sections.

By all means, wrap the pipes, but use denser rubber for vibration pads. Extra bracing (for clamping to) might also help.

Alternative: Before you start pulling out nails, check the water velocity at your fixtures, and if it is extremely high, a pressure reducing valve can be installed on the supply line.