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Water Pressure in shower varies

Old 09-29-2013, 12:28 PM
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Default Water Pressure in shower varies

Our shower normally is like a fire hose which is great but over the last few months the water pressure goes way down to a quarter of what it normally is stays that way for a week or so then returns to normal. Any thought as to why? When the pressure changes there is a loud "thud" noise. I have no idea and thoughts would be helpful. All the other shower and faucets are fine.
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Old 09-29-2013, 02:37 PM
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Check the cartridge in the faucet..sounds like the pressure balancing device is starting or is stuck what type of faucet by chance a moen?
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Old 10-01-2013, 07:24 AM
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Does this shower valve have a temp protection thermostat in it?
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Old 10-01-2013, 01:49 PM
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Hello. !!!
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Old 10-02-2013, 10:37 AM
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Sorry work won't get done by itself.. its Delta and I do not know
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Old 10-02-2013, 11:07 AM
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The loud "thud" could be water hammer/hydraulic shock.
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Old 10-02-2013, 11:12 AM
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Start with the cartridge.
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Old 10-02-2013, 12:52 PM
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Will do thanks
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Old 10-02-2013, 03:57 PM
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Start with the cartridge only if you're 100% sure it's not in the shower head itself...
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Old 10-02-2013, 04:58 PM
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Originally Posted by Flot View Post
Start with the cartridge only if you're 100% sure it's not in the shower head itself...
...like maybe a loose water limiting washer or something else clogging it up periodically.
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Old 10-02-2013, 05:00 PM
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I had one shower head that had restricted flow, turned out the pvc pickup tubes in the hot water heater had disintegrated and were clogging up the shower head.
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