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- From: sbrenner@cbnewsb.cb.att.com (scott.d.brenner)
- Subject: Need Help From Plumbing Gurus
- Message-ID: <1993Jan2.203935.21414@cbfsb.cb.att.com>
- Sender: news@cbfsb.cb.att.com
- Organization: AT&T
- Distribution: usa
- Date: Sat, 2 Jan 1993 20:39:35 GMT
- Lines: 77
-
- I've been having some problems with the plumbing in my house
- and I have a question for you plumbing wizards.
-
- The problems started a few weeks ago when my wife and I noticed
- a combination of symptoms we otherwise might have ignored. Sink
- faucets would run even if completely shut, the toilet would run
- constantly, and water would leak out of the pressure relief valve
- on the hot water heater. In addition, water would come out of
- sink faucets like a fire hose for a second or two before returning
- to a normal pressure. Then, one morning, my wife saw 5-10
- gallons of water on the basement floor, apparently having come
- from the pressure relief valve on the hot water heater during the
- night.
-
- I called the company that supplies water to my neighborhood and
- asked them if perhaps the pressure might be too high. They were
- rather rude and simply told me that they're only responsible for
- getting water to my incoming pipe; the pressure wasn't their
- problem as long as I was getting water. They mumbled something
- about having to keep high pressure for the fire hydrants and told
- me I should adjust my pressure-reducing valve.
-
- When I got home, I found what I guessed to be the pressure-reducing
- valve. I turned the control screw both ways, but it didn't seem
- to make a difference; things still leaked. I finally gave in, and
- called a plumber. He told me that the reducing valve had probably
- broken and he replaced it. He told me that the pressure in my pipes
- shouldn't be more than about 80 PSI and the new valve should ensure
- that the pressure didn't exceed 80 pounds. He put a gauge in the
- system and I saw that the pressure was now holding steady at about
- 75 pounds.
-
- The faucets and toilet haven't leaked since last weekend when the
- plumber was here, and the pressure coming out of the faucets seems
- more normal (no more fire hose pressure). I have noticed, though,
- that the water heater pressure relief valve lets out about 20 or 30
- ounces of water a day. This is much less than before the pressure
- reducing valve was replaced, but the water heater almost never leaked
- before my problems started a month ago.
-
- Today, I saw something strange. I checked the pressure gauge
- a few times throughout the morning, and it was always at about 80
- pounds. Then, around lunchtime, I saw that the pressure gauge had
- pegged itself at about 120 PSI. I noticed that the water heater was
- on at the time (by "on," I mean actively heating water). I shut off
- the main water supply valve to the house, which is *before* the
- pressure gauge (so the gauge still measures the pressure in the pipes,
- even if the valve is closed). I opened a faucet and let the water run
- until it stopped. The pressure dropped while the faucet was open.
- But as soon as I closed the faucet, the pressure climbed steadily,
- until the gauge pegged itself again. Remember that the water supply
- is *still* turned off and the water heater is *on*. After the water
- heater shut off, the gauge still read about 120 PSI. I turned the
- main valve back on and opened a faucet and let the hot water run for
- a minute or two. Now the pressure dropped down to about 80 pounds and
- stayed there.
-
- I'm no plumber, but the only conclusion I can reach is that the water
- heater is somehow increasing the pressure in the pipes when it is
- heating water. I don't think the water coming into the house is the
- culprit, because I saw the high pressure even when the main supply
- was shut off. Also, when the water heater isn't actively heating
- water, and someone has relieved the "extra" pressure by opening a
- faucet, the pressure is at a "normal" 80 pounds or so.
-
- Am I observing a normal condition, or is this indicative of a problem?
- If anyone has ever seen this behavior or has any clues or ideas that
- might be helpful, I'd be very interested in hearing them. Please
- respond directly to sbrenner@attmail.com; I'll post a summary if I
- get sufficient responses.
-
- a T d H v A a N n K c S e
-
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Scott D. Brenner AT&T Consumer Communications Services
- sbrenner@attmail.com Basking Ridge, New Jersey
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-