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Old 12-18-2017, 03:46 PM   #1
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Why 2 Black Water valves?

Newbie here with a 2018 Chateau 26B. I am wondering why on my rig I have valves on both sides to empty my blackwater. To empty I first need to pull the valve on the door side directly under the toliet. U can hear it emptying when i do. I then go to the service side and pull the other valve which will then flow out the hose. Why is there a 2nd valve on the other side? What is its purpose? I have never seen another rig set up like that. Is there 2 seperate black water tanks?
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Old 12-18-2017, 04:09 PM   #2
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Originally Posted by SanDiegoLew View Post
Newbie here with a 2018 Chateau 26B. I am wondering why on my rig I have valves on both sides to empty my blackwater. To empty I first need to pull the valve on the door side directly under the toliet. U can hear it emptying when i do. I then go to the service side and pull the other valve which will then flow out the hose. Why is there a 2nd valve on the other side? What is its purpose? I have never seen another rig set up like that. Is there 2 seperate black water tanks?
Typically when the black tank is on the opposite side of the dump valves - there is a second valve... one at exit from tank - and one on the 'dump side'.
Allows keeping the piping underneath the RV empty - important in winterizing certainly - but also keeping the waste in the tank with other liquids - and not plugging up the pipe between dumps.
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Old 12-18-2017, 04:11 PM   #3
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I have wondered about this also...
Maybe it's best to keep the... Stuff... up in the tank; rather than let it out into the drain pipes. If it sits down there, and isn't getting sloshed around: could it be finding new ways to clog up those pipes?
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