Re: Dishwasher pressure reducing valve
Posted by hj on June 23, 2003 at 09:46:46:
In response to Re: Dishwasher pressure reducing valve
You also need a hammer arrestor. In fact the PRV is probably contributing to the problem since it locks the water hammer shock and prevents it from being dissipated through the rest of the system. I haave had the same problem on sensor faucets which have a solenoid valve and a check valve which operates the same as a PRV as far as preventing back flow. With those, installing a flexible braided supply tube gave sufficient resiliency that the line could "bulge" and absorb the pressure wave.

: I have moved into a new house and every time I use the dishwasher there is a thumping sound coming from the pipes. The dishwasher water valve is below the sink and when the dishwasher is on, the metal pipe going to the cold water tap in the sink shakes and makes thumping noises. There is a water pressure reducing valve to the dishwasher so I thought this should prevent water hammer from occuring. Is the pressure reducing valve faulty or do I need to install a water hammer arrestor as well?

: Thanks in advance,
: Rick

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