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Old 02-12-2017, 03:32 PM   #1
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Help! Does anyone know what is causing this??

Hi guys, I have a 2015 Rockwood Signature Ultra Lite, and on the backside underneath the city water connection is the antifreeze input port, and it's leaking water. What would cause the antifreeze input port to leak water? I live in Texas so antifreeze isn't needed, and I've never put any in there so I would assume that it's empty. I live in my trailer year round, if that makes any difference.
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Old 02-12-2017, 04:07 PM   #2
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Hi guys, I have a 2015 Rockwood Signature Ultra Lite, and on the backside underneath the city water connection is the antifreeze input port, and it's leaking water. What would cause the antifreeze input port to leak water? I live in Texas so antifreeze isn't needed, and I've never put any in there so I would assume that it's empty. I live in my trailer year round, if that makes any difference.
Inside your unit is a valve that closes off the city water line and opens the anti freeze line. I would suspect this valve is not fully opened or has gone bad. Open and close valve a couple times then leave it opened for city water to flow. Check to see if leaking stopped. If not might have to replace valve.
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Old 02-12-2017, 04:09 PM   #3
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The antifreeze port is just a quick way to put antifreeze your system - it connects to your interior water lines. I am wondering if is leaking due to overpressure in your water system.

Since you full time, do you use a variable water pressure regulator? What is the water pressure coming from your city water connection?
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Old 02-12-2017, 04:18 PM   #4
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Queenpenny:

I've attached a plumbing diagram that probably covers most RV's. If you have a handle to winterize, then you probably have a 3-way valve as shown in the upper brown dashed oval. If your's isn't exactly like this, it will be close; this should help you get started, anyway.

Another guy just posted with the same problem a couple days ago. He screwed a hose plug, I assume like this one shown below, into AF connection and it stopped leaking.



Cheaper and easier than trying to replace the 3-way valve.

Good luck.

RV Plumbing pic.pdf
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Old 02-12-2017, 04:29 PM   #5
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First it means you have a leaky check valve in your water pump, see thread below on how to try to fix issue....

http://www.forestriverforums.com/for...tem-72853.html
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Old 02-12-2017, 04:30 PM   #6
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Originally Posted by BamaBob View Post
The antifreeze port is just a quick way to put antifreeze your system - it connects to your interior water lines. I am wondering if is leaking due to overpressure in your water system.

Since you full time, do you use a variable water pressure regulator? What is the water pressure coming from your city water connection?
Yes I do have a water pressure regulator in use, however, I'm not quite sure what the pressure is coming from the city connection.
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Old 02-12-2017, 04:35 PM   #7
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Originally Posted by rockfordroo View Post
Queenpenny:

I've attached a plumbing diagram that probably covers most RV's. If you have a handle to winterize, then you probably have a 3-way valve as shown in the upper brown dashed oval. If your's isn't exactly like this, it will be close; this should help you get started, anyway.

Another guy just posted with the same problem a couple days ago. He screwed a hose plug, I assume like this one shown below, into AF connection and it stopped leaking.



Cheaper and easier than trying to replace the 3-way valve.

Good luck.

Attachment 129680
Thank you for your help, I'm a college kid living in an RV my parents bought for me and I don't know anything about it. I have a general question though, if I'm connected to city water is it still necessary to have my water pump on? I was told that as long as I'm connected to the city water line I don't have to keep it on. Thoughts?
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Old 02-12-2017, 04:48 PM   #8
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Nope, if you have city water pressure the pump can be off. It should never run anyway, but if there is no water in the tanks and you lose city pressure for a while, the pump could run forever and burn out. Turn it off.

The leak is because the check valve is either dirty or incorrectly seated. You can fix it or plug it as others have suggested.
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Old 02-12-2017, 05:01 PM   #9
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If you look at the plumbing pic, you'll also notice that you may start getting water flowing backward into your fresh water tank depending on which way the 3-way valve is set and/or if the 3-way is leaking by.
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Old 02-12-2017, 06:04 PM   #10
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Originally Posted by Queenpenny View Post
Thank you for your help, I'm a college kid living in an RV my parents bought for me and I don't know anything about it. I have a general question though, if I'm connected to city water is it still necessary to have my water pump on? I was told that as long as I'm connected to the city water line I don't have to keep it on. Thoughts?
You do not have to leave your water pump on when you are hooked to city water.

Unless your water pressure regulator has a gauge on it you will not know the exact water pressure coming from your city water supply, but it is probably regulated at 45PSI which will be OK in your case.
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Old 02-13-2017, 01:57 PM   #11
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I agree that it's likely that the check valve in your water pump is leaking. That check value is supposed to prevent water from going backwards through the pump. In the pic that rockfordroo posted you'll see that the city water line enters the system just after the output side of the pump (after the check valve). If the check valve is leaking, the water pressure will push water back through the pump and fill your fresh water tank. If the tank is full, water will come out of the tank overflow and/or the antifreeze inlet.

Is your water tank full even though you didn't put any water in it?
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Old 02-15-2017, 10:59 AM   #12
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A friend of mine had water running out his when city water was connected. He connected to the leaky input and ran water for a few seconds there then reconnected to city input and leak was sealed.
It seems as though some debris had a valve stuck open and running water through it cleared it out.
Not sure if this is your problem.
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