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Mike Presbitero 12-12-2007 06:00 PM

Water Pressure for Hot Water
I replaced my water heater and there is one shower that has severly reduced pressure for the hot water only. I removed the shower head and cleaned it but it did not help. There seemed to be a lot of dirt that came through the new tank when I first put it in. The shower that is the problem was working fine at first but has slowed to a trickle in the last couple of days. The problem shower is in the basement and close to the new tank. If it is dirt in the line causing this, how do I clear the pipes? All other facets are the same pressure as before the new tank.

Mike Swearingen 12-12-2007 06:19 PM

Soak that shower head in a bowl of vinegar overnight to dissolve all the calcium and other deposits, etc., and back-wash it, then rinse it out good.
Should solve the problem.

Mike Presbitero 12-13-2007 02:55 PM

Thanks for the reply. I thought at first it was in the shower head so I took it apart and cleaned it. I then tried turning on the water without the shower head and it was still just a trickle so I believe there must be a junk trape on the hot water line that is filled and causing the problem. Is there any way to clear the line without going behind the wall and taking apart the problem pipe? It is the hot water only. The cold water pressure is the same as before the new tank.

Sammy 12-13-2007 03:50 PM

Its probably something lodged behind the hot water valve.. Either something that was in the tank or a blob of solder etc..

Probably have to break down the valve to the point where you can flush it out.

redline 12-13-2007 04:01 PM

You maybe be able to back flush the line.

Get a garden hose and push water back threw the line. You will need to drain the line first.

Do you have copper pipes or galvanized?

Marlin 12-13-2007 07:31 PM

Back flushing is an interesting idea that I never thought of before. That one will probably come in useful at some point.

Personally I would shut the water down, pull the shower body apart, and flush or change the cartridge if it's full of gunk

jpplumber 12-13-2007 07:44 PM

If the debris got this far I wouldn't want to push it back into the line. I would shut off the water. Remove the cartridge from the valve and turn the water back on for about 5 or 10 seconds. It is best to do this with a helper holding a bucket catching the water and you can inspect for debris in the bucket, getting a third person to communicate with cell phones about turning the water on and off is even better as one person needs both hands for the bucket. If you still have the problem after this you will probably have to cut into the hot line next to the valve as that is probably where the debris is...yes this means cutting into the wall in back of the shower. The debris may even be in the cartridge itself and BINGO.

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