My husband & I are new home owners, we just moved into a newly built
home in November 2003. Over the last couple of months we've noticed a
significant decrease in our hot water pressure. The pipes (in all 3
baths) make that high pitched noise when the shower is running, the
shower head in the master bath is not a pulsing head but now seems to
"pulse" like there is a lot of air in the pipes. If someone is in the
shower or the washer or dishwasher is on, the hot water flow is little
more than a trickle if a faucet is turned on somewhere else in the
house. We have a large garden tub separate from the shower in the
master bath. When we first moved in, I could be running a tub full of
water while my husband was in the shower--I can no longer do that. My
daughter wasn't able to take a shower in her bath a few days ago at
the same time I was filling up the garden tub in my bath. I have
noticed that the stream of water has decreased by at least 50%, if not
more, in the garden tub when no other water is running. A few evenings
ago there was a great rumbling/vibration and I finally went down to
the basement to see if the noise was coming from there, and it seemed
to be coming from the hot water heater which seemed to be vibrating
all of the ventilation ducts and everthing down there--my daughter was
in the shower. We have only had that particular noise/vibration happen
once so far. Our home is still under warranty with the builder and I
have yet to reach him on the phone. In the meantime, any ideas? I've
been reading about dip tubes, hard water and scale buildup. We have
had hard water in the past and scale buildup and our water in our new
home doesn't seem to be "hard". We have had no change in the cold
water pressure. The master bath and bedroom is on the North end of the
house, the kid's baths are on the South end, as is the water heater.
We would appreciate any advice/guidance on this. Thanks.
The water heater is definitely a suspect. Although dip tube failures
were solved some years ago, I suppose something might have happened to
You mentioned rumbling/vibration from the heater. That can occur
when the heater has been firing and the pressure in the tank is
suddenly lowered (by running the shower, for example). If water
flow *into* the heater were restricted, pressure would drop a lot
and the rumble worse. Aside from the dip tube, it could be a
blockage in the Cold supply to the heater, such as inside a
Checking the flow rate from the drain valve on the heater would
prove that the low flow was due to the heater or Cold supply.
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