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Old 09-18-2023, 05:58 AM   #1
Nanc
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Black Water Flush leaking inside my camper

We own a 2021 Keystone Residence 40 loft. It sits on a permanent spot, so it is not hauled around. We noticed that when we hookup a water hose to our black water flush valve outside, that water is leaking inside the camper underneath the bathroom sink. We removed the small access panel under the sink, and along the floor against the outside wall is where we saw seepage.
The black water flush valve outside is located right where the bathroom sink is located, so they share a wall.
Any suggestions on how to find and repair this leak?
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Old 09-18-2023, 06:16 AM   #2
jxnbbl
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If you post a picture it would be great. I've had this happen once and had to redo the "pex" connector on the pipe as it wasn't installed correctly.
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Old 09-18-2023, 06:27 AM   #3
Nanc
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I'm currently not at my camper. But I did take photos over the weekend but not sure how to attach them to this message (I'm new, as of today, to this Forum). If you can tell me how, I'll send what I have and can take more photos this weekend when we go back to the lake, as we are closing up this weekend for winter.
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Name:	Outside black water flush valve connection.jpg
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Name:	Bathroom sink.jpg
Views:	13
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Old 09-18-2023, 06:53 AM   #4
JRTJH
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Quote:
Originally Posted by Nanc View Post
I'm currently not at my camper. But I did take photos over the weekend but not sure how to attach them to this message (I'm new, as of today, to this Forum). If you can tell me how, I'll send what I have and can take more photos this weekend when we go back to the lake, as we are closing up this weekend for winter.
Click on this link to the instructions for posting photos: https://www.keystoneforums.com/forum...ad.php?t=27006 Specifically post #8 in the thread.

If you need more detailed instructions or want to read a lengthy discussion of the topic, click on this thread: https://www.keystoneforums.com/forum...ead.php?t=7518
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Old 09-18-2023, 07:45 AM   #5
sourdough
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The picture under the sink shows the red and blue pipes for the faucet. There are also 2 white lines going up. Follow those and you should find a anti siphon valve. Have someone turn on the black tank flush (or you can) and check those white lines, the connections and the valve at the top to see if it isn't leaking somewhere along the way. If not you can pull the outside connection to see if it is leaking inside the wall.

Read posts #2 and #4;

https://www.keystoneforums.com/forum...127#post547127
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Old 09-18-2023, 07:48 AM   #6
flybouy
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Quote:
Originally Posted by Nanc View Post
We own a 2021 Keystone Residence 40 loft. It sits on a permanent spot, so it is not hauled around. We noticed that when we hookup a water hose to our black water flush valve outside, that water is leaking inside the camper underneath the bathroom sink. We removed the small access panel under the sink, and along the floor against the outside wall is where we saw seepage.
The black water flush valve outside is located right where the bathroom sink is located, so they share a wall.
Any suggestions on how to find and repair this leak?
If you are POSITIVE that the water is not coming from above and following the pipe down, then it must be one of 3 things. The first and easiest would be to replace the hose washer in the female fitting outside. If that simple and inexpensive test doesn't work then it must be the fitting itself has failed (Crack or split) or the pex line is leaking at the fitting or is split near the clamp.
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Old 09-18-2023, 07:55 AM   #7
Nanc
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Thank you I will check this this weekend.
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