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Old 03-04-2017, 02:49 PM   #1
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Wet Bay Update

After reading your threads on updates, I used most of your ideas and did this...Am I missing anything? I can use my spray if needed, both hot or cold or mixed, and can use cold to flush black tank
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Old 03-04-2017, 05:56 PM   #2
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Even though the tank sprayers usually have a backflow preventer maybe an external one just incase? I do the same using what used to be the outside shower that I changed out to a hose fitting.
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Old 03-04-2017, 06:26 PM   #3
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Most tank sprayers have a built-in back flow preventer and a vacuum break, but a third external back flow preventer can't hurt...
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Old 03-04-2017, 10:58 PM   #4
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I too think your backflow preventer is what you are missing. You certainly don't want your fresh water contaminated with black water.
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Old 03-05-2017, 05:56 AM   #5
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I thought that too, but there is always pressure until you turn it off at cold valve, so how would it get back to fresh water? Since all of you questioned that, I will add one. Do I add to the line between "Y" and flush connector or between "Y" and cold water shut off valve?
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Old 03-05-2017, 07:56 AM   #6
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Why did you hook up the hot water?
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Old 03-06-2017, 07:00 AM   #7
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Quote:
Originally Posted by cwit View Post
Why did you hook up the hot water?
For the sprayer, hot, cold, or mixed
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Old 03-06-2017, 07:31 AM   #8
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I flush with cold only but I did put an additional back flow valve in the short hose to the flush fitting.

Hope this helps
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Old 03-06-2017, 10:49 PM   #9
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Quote:
Originally Posted by swagn View Post
I thought that too, but there is always pressure until you turn it off at cold valve, so how would it get back to fresh water? Since all of you questioned that, I will add one. Do I add to the line between "Y" and flush connector or between "Y" and cold water shut off valve?
Don't assume there is always pressure at the cold water. What if the campground had a leak and had to shut off the water? Or the pressure just drops because of the leak? When the pressure drops, it could cause a backflow. Not a likely event, but it only takes one event like that to make you wish you had installed the backflow preventer. Anyway it is just one of those inexpensive things that you can do "just in case?"
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Old 03-07-2017, 02:04 PM   #10
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Quote:
Originally Posted by swagn View Post
I thought that too, but there is always pressure until you turn it off at cold valve, so how would it get back to fresh water? Since all of you questioned that, I will add one. Do I add to the line between "Y" and flush connector or between "Y" and cold water shut off valve?
If "Y" is only in place when you're standing there flushing the tank then you'll probably be OK without the second back flow preventer.
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Old 03-07-2017, 04:02 PM   #11
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I like that. Nice and clean and well thought out.
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