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Old 05-07-2012, 07:14 PM   #1
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low pressure for hot water

My mom and dad have a 1998 nomad tt and the hot water pressure is very low start out strong but quickly fades cold is fine no leaks don't know where to start ???

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Old 05-07-2012, 08:58 PM   #2
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Originally Posted by 2000sunline
My mom and dad have a 1998 nomad tt and the hot water pressure is very low start out strong but quickly fades cold is fine no leaks don't know where to start ???
Well start by turning off the water heater and disconnect the water lines inlet and outlet look for any obstructions inside the tubes on either side of the hot water heater sometimes calcium will build up inside the water heater if you can take the heating element out after the element is out put d c l r in the hot water heater with water then flush it out several times. hope this helps.

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Old 05-07-2012, 09:12 PM   #3
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You might have an obstruction in the cold water supply line to the water heater. Enough water is trickling in slowly until pressure builds up to normal levels, but drops to almost zero because the supply line cannot let enough water in. Check for a check valve on the cold supply line to the water heater. There are noted for failing. Very expensive--around $5.00
The spring that is mounted on the valve shaft is held in place by a very poor design and is subject to frequent failure.
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Old 05-08-2012, 01:35 PM   #4
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Check valves

Had the same thing happen on my 2005 TT. After checking all hoses and even taking some completely out looking for obstructions, the problem turned out to be a cheap plastic check valve at the HW discharge on the HW heater. I replaced the check valve with a brass one I had previously purchased to keep my pump from back flowing into the fresh water tank when connected to shore water. It was the same size and thread and flow direction but better quality. After installation, HW flow and pressure returned to normal.
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