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Old 05-25-2016, 08:30 PM   #1
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Leak Under Bathroom Sink

I have a leak in the bathroom sink cabinet that I think is associated with the black tank cleaning system. It is not a bad leak, but a leak none-the-less. It appears to be coming from the black piece attached to cold water pipes under the sink. I have attached a photo. Any advice on fixing this would be appreciated. 2014 Cedar Creek 32RL

Thanks in advance.

/Users/bbbarker194/Desktop/IMG_1034.JPG
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Old 05-26-2016, 10:03 AM   #2
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You linked to a file on your desktop. You need to attach the picture to the post.

There have been several reports of the vacuum breaker for the tank flush leaking. Without seeing the pic I don't know if that's your problem or not, but it's something to look at.
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Old 05-26-2016, 10:08 AM   #3
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Photo attempt #2

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Old 05-26-2016, 10:23 AM   #4
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Yep, that's the tank flush vacuum breaker.

I see a little trail of water on the blue pipe.
Have you tried tightening that fitting nut a little?
Is it leaking from the fittings or the vacuum breaker itself? If it's the vacuum breaker that's leaking it's best to just replace it.
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Old 05-26-2016, 10:33 AM   #5
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Many reports here of the black plastic vacuum breaker leaking but studying your photo, I'd have to agree to check the blue PEX line fitting to see if it is tight.
If all connections are OK you'll need to replace the vacuum breaker.
Buy a brass one and you'll never have problems again.
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Old 05-26-2016, 10:58 AM   #6
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Thanks guys. I will check all connections.
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Old 05-26-2016, 09:55 PM   #7
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Quote:
Originally Posted by Bbbarker194 View Post
I have a leak in the bathroom sink cabinet that I think is associated with the black tank cleaning system. It is not a bad leak, but a leak none-the-less. It appears to be coming from the black piece attached to cold water pipes under the sink. I have attached a photo. Any advice on fixing this would be appreciated. 2014 Cedar Creek 32RL

Thanks in advance.

/Users/bbbarker194/Desktop/IMG_1034.JPG

As my plumper calls it, there has to be air behind water to make a drain flow, so in some models, rather than a roof vent at the bathroom sink there is aan air gap on the sewer and many report the a gap/antibackflow valve for the black tank flush. It could be either so test cause and effect to find out which is leaking
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Old 05-26-2016, 10:15 PM   #8
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Vacuum breaker

That looks like the one made by B&B molding, Model 571. I had one go bad with a stuck ball in the valve. I called b&b and they sent one out no charge.

Phone number 574-259-7838.
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Old 05-26-2016, 11:15 PM   #9
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Quote:
Originally Posted by Bbbarker194 View Post
I have a leak in the bathroom sink cabinet that I think is associated with the black tank cleaning system. It is not a bad leak, but a leak none-the-less. It appears to be coming from the black piece attached to cold water pipes under the sink. I have attached a photo. Any advice on fixing this would be appreciated. 2014 Cedar Creek 32RL

Thanks in advance.

/Users/bbbarker194/Desktop/IMG_1034.JPG
I can't see your photos, but we had a similar situation on our first trip with our new Rockwood 2304 mini lite. It turned out to be the hot water connection to the faucet not being tightened. It was a simple fix requiring hand tightening.
Do you only get the leak when using the black tank flushing system, which must be connected to the outside water source at the dumping station ?
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Old 05-26-2016, 11:28 PM   #10
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Yes, I only get the leak using the black tank flush
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