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07-13-2015, 11:44 AM
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#1
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Established Member
Join Date: Jul 2007
Location: Box Elder
Posts: 13
M.O.C. #7344
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Water Heater Noise
Hello everyone,
We have a nuisance noise from our water heater whenever we are using hot water. It's a whining, humming, vibration noise. Hot water flow is good and the water heater is producing adequate hot water. Our water heater is a Suburban SW12DEL. I have isolated the source of the noise to the hot water outlet on the rear of the water heater and have even tried using my air pump to blow air into the hot water outlet to hopefully blow out any mineral debris that may be clogging the outflow opening. In the course of my trouble shooting, I have discovered that there is a male brass coupling connecting the hot water line to the water heater that appears to be some sort of check valve, but I have not been able to unscrew this fitting from the water heater.
Anyone out there who has experience this sort of nuisance and have suggestions to correct it? Suburban support says the fitting is a Keystone add on and not a Suburban part. Will appreciate your feedback. Thanks
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07-13-2015, 12:09 PM
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#2
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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I'm sure you've got mineral buildup, but I've never had to take the check valve off so I don't have an answer for that. Trying to control mineral buildup is why we use an OntheGo water softener and it does seem to work. The unfortunate news is that water softeners will help to dissolve buildups, but they take at least as long as it took to build it up in the first place.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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07-13-2015, 01:02 PM
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#3
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,155
M.O.C. #6433
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I would guess it is that check valve since water valves can and do make that sort of noise. Even my outside faucets at home sometimes make similar noises at certain flow rates.
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Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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07-13-2015, 02:16 PM
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#4
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Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
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Check valve and they just screw off using slip pliers or other plumbers wrenches. Have replaced two for other rv'rs in the last year. Not a real hard job...if you can get to it. John
__________________
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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07-13-2015, 03:05 PM
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#5
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Montana Master
Join Date: Dec 2007
Location: Kansas City, Missouri
Posts: 2,707
M.O.C. #7992
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John had much better luck than I did when I replaced mine It was a B---- to get out. Finally got it broke loose with a long crescent wrench with a cheater on the end of that. Jim
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2006 3000RK
2009 Ram 2500
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07-14-2015, 01:51 AM
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#6
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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Yep, it's the check valve.
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2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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07-14-2015, 07:33 AM
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#7
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Montana Fan
Join Date: Apr 2011
Location: Newbury Park
Posts: 131
M.O.C. #11329
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07-17-2015, 11:52 AM
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#8
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Established Member
Join Date: Jul 2007
Location: Box Elder
Posts: 13
M.O.C. #7344
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Thanks for all the feedback. I did replace the check valve on the water heater hot water outlet and the problem is solved. I examined the old check valve and discovered two things. First, the o-ring around the plastic plunger had come off, and second, there was a piece of debris lodged in the spring. New check valve cost me $14, but it's sure nice to have a quiet hot water flow once again. Thanks again to all you responders.
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