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LouB[_2_] LouB[_2_] is offline
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Default Water heater noise

Bob M. wrote:
"LouB" wrote in message
Bob F wrote:
LouB wrote:
I happen to be standing near the electric hot water heater while the
dishwasher was running. Hear noise like "rattling". Something to
worry about or just normal? Ideas please?

It could just be the heat traps at the top of the heater. Some of
them rattle at low flows.

Thanks, I think:-)) What is a heat trap?


A short stub of pipe (on both hot & cold side, usually) with a metal
ball in them. Designed to keep hot water in when there's no hot water
being called for, they sometimes rattle. I've never been real impressed
with this design.

I made a heat trap out of 1/2" copper pipe; it is basically just a loop
and has no moving parts, no flapper valves, etc. so it will always work,