🚀 go-pugleaf

check@dbsun.uucp (checkett) writes:

>I have a question that bothers me every morning. I wake up and go to the john
>to have a shave and turn on the hot water full blast. Over the next 20-30
>seconds the water temperature goes from freezing to quite hot as desired. 
>The problem is that the flow rate of the water drops off as the temp goes up. 
>If I don't touch the faucet the flow nearly stops. What is happening? 
>I assume it has something to do with the expansion/contraction of the pipes 
>in response to the temp. Any good plumbers out there?
>One more thing, the pipes start to scream as the water gets hotter but if
>I increase the flow by turning the knob the noise disappears.


>Dave Shine, St. Louis, MO

Not an expert opinion:  It's not your pipes, it's the faucet changing.  I had
this happen with my old cold-water faucet, until I replaced it.  So it might
not even be heat-related.  Perhaps there is some slack in the parts and
the water pressure slowly moves them.
The scream is probably caused by the faucet, too.  If it vibrates, it's likely
to vibrate the pipes.
Try turning off the water heater for a day, and see if it still happens.
Or try it after somebody has used up all the hot water with a long shower.
-- 
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