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Old 05-25-2016, 07:06 PM   #1
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replaced water heater but lost pressure


I replaced a 20 year old 40g water heater with a 50g Rheem XG50T12DU36U0.

Due to the additional height, I had to add a 90 fitting to the cold and discharge side so I don't have to bend the tube too much. I don't see how these two fittings can reduce my pressure by so much.

I have a grophe shower head that spins with pressure, it no longer capable of spinning and the water is dropping out of it and not shooting out like it used to.

The pipe is old galvanize that'll be replaced shortly but I don't see how the new water heater can reduce my pressure by so much.
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Old 05-25-2016, 07:41 PM   #2
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Try disconnectimg your shower head and running the water maybe some sediment got in the line during the swap out, also check the water saver screen in your shower head for sediment, hopefully it's as simple as that. Good luck!
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Old 05-25-2016, 08:19 PM   #3
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Re: replaced water heater but lost pressure


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Originally Posted by FullSwing View Post
Try disconnecting your shower head and running the water maybe some sediment got in the line during the swap out, also check the water saver screen in your shower head for sediment, hopefully it's as simple as that. Good luck!
This is the most likely cure------------

If the hot water pressure is low every where in the house--check the shut off valve for the water heater---the old style gate valves sometimes fail to open fully ---and need replacing.
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Old 05-25-2016, 08:25 PM   #4
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Re: replaced water heater but lost pressure


both are great suggestions, I'll try that first. Just making sure that it isn't that new tank doing this. Copper pipe should be in place in the next month or so, so sediment isn't a major concern as all shower valves will be replace at the same time.
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Old 05-25-2016, 08:32 PM   #5
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Re: replaced water heater but lost pressure


Make sure the water trap heat nipples are not installed basackward.
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Old 05-25-2016, 08:38 PM   #6
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Re: replaced water heater but lost pressure


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Make sure the water trap heat nipples are not installed basackward.
the original doesn't have a heat trap and I didn't add one and also read that if I have a recirc pump then I shouldn't be using one.
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Old 05-25-2016, 08:42 PM   #7
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Re: replaced water heater but lost pressure


I have had rentals lose water pressure simply by turning off the water. The galvanized pipes closed up from the sediment. Your problem is no surprise.
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