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Old 04-15-2008, 01:22 PM   #1
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Help - Very Low Hot Water Pressure


Hi folks,

Bought my house a little over 2 years ago and was built in 85.

Water set up
1. On a well
2. Water tank is a little less then 2 years old (lifetime warranty)– has an ionized rod
3. Installed a Culligan Water softener 8 months ago – we are on very hard water
4. Pressure tank less (fiberglass) then 6 months old
5. Well pump (Berkeley), pitiless adapter, water line and wiring all less then 1 month old
6. Pressure tank is set at 55 Psi
7. Currently no sediment filter (for about two weeks) installing a new one this weekend.

The problem
After I had a plumber replace my pressure tank he suggested I changed my 1/2 inch to 3/4 inch intake to the water tank. It was after I made this change that I immediately lost my hot water pressure. Worried that I over soldiered I completely replaced everything over again, this time making sure I didn’t over soldier anywhere and no change.

I have hot water pressure loss from every tap in the house including tub, shower etc and as soon as I have more then one tap running hot water the other has almost nothing coming out of it. I do notice that when I first turn on the hot water it comes out strong and then immediately tapers off. My cold water is fantastic but overpowers my hot water. My utility sink is the closest thing to the hot water source, after that it’s my washing machine, when I flip the tap to hot, again loss of pressure but not as bad as everywhere else.

One thing I did notice, before I changed my copper work the second time, when ever we ran the tub we could hear a high pitched sound coming from the pipe, almost like air was somehow entering and creating a whistle like sound. Since I have changed the pipe work I sometimes hear a popping sound coming from the water tank and the whistle sound stopped.

When we first moved in both hot and cold were comparable, the hot water pressure was lower but it didnt' bother us enough to do anything about it.

I would really like to avoid paying a plumber for this as I consider myself an avid reno guy and am not afraid of plumbing.

Please help L

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Last edited by Renoguy; 04-15-2008 at 01:25 PM.
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Old 04-15-2008, 04:57 PM   #2
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Help - Very Low Hot Water Pressure


Check the outlet side on the hot water tank, maybe the nipple on the top of tank is clogged up, it's a starting point.

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Old 04-16-2008, 09:01 AM   #3
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Help - Very Low Hot Water Pressure


Thanks - just so I am clear, by outlet side do you mean hot water out pipe?

I tried flushing the tank last night witht the pressure on and I saw the same low pressure coming out of the hose as everywhere else in the house, I let it run for about a minute or so and water was cold the entire time, it also didn't help the pressure anywhwere in the house. Does that signify anything? I thought for sure that I would start to get hot water coming out of the hose.
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Old 04-16-2008, 09:33 AM   #4
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Help - Very Low Hot Water Pressure


How old is the heater? It may need to be replaced.
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Old 04-16-2008, 01:27 PM   #5
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Help - Very Low Hot Water Pressure


It's less then 2 years old with a lifetime warranty on it - I was thinking of calling the 1800 support number but was envisioning myself getting into arguments and blame games with GE but hopefully not.
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