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Old 09-13-2015, 04:06 PM   #15
Join Date: Sep 2015
Posts: 34
Black water drain

O.K. The tank leaks water, so there must be a crack in it. We used a snake sent from the waste water drain & must have cracked it. It never leaked before. Then we noticed a valve under the trailer. Husband had to climb under the trailer & pull it open. All of a sudden lots of Back water came out of the Grey Drain into the outside. So Now we drained the black water out of the grey drain, which has 2 more valves,One from the kitchen sink & the other for the black water. The one we tried to drain for the black water was actually for the shower. Who would have known. Does this sound normal. Please explain if this is normal.

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Old 09-13-2015, 06:33 PM   #16
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No, this does not sound normal. There are only two holding tanks.
There should be one drain with two valves... one for gray and one for black. The valve handles should be colored accordingly.
You drain the black first... then the gray which also flushes all the nasties out of the stinky-slinky.

As far as the leak, can you SEE a crack in the tank? I would be surprised. Those things are pretty resilient.

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Old 09-19-2015, 12:19 AM   #17
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Its not unusual to have more than two tanks, especially if the bathroom is located far from the kitchen... ie Rear kitchen and center bath or the reverse. Typically your gray and black tank will exit from the same discharge point, with a value for each tank. You may also have an additional gray tank located closer to the kitchen.

Be sure to use the proper RV toilet paper, never throw wipes or Q tips in the toilet.

Also, a plunger will be useless on a black tank clog since the tank is vented to the outside, you will get no pressure build up in the tank.

Use plenty of water when dumping your black and gray tank, after it is drained, fill it and drain again, using black tank flush if you have them. Amazing how much gunk you will continue to discharge from an "empty" tank.

Good Luck.
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Old 09-19-2015, 07:26 AM   #18
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my outback has 3 tanks, 2 grey and 1 black, 1 grey are connected to

the same outlet, the other grey is a standalone. we have 2 drain hoses

connected to a Y, and a single hose to the sewer.

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Old 10-06-2015, 09:11 PM   #19
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The solution is simple. Go outside to the black tank valve. Place your eyes in position so that when you pull the handle you will be able to see what type of plug you have. I would suggest a flashlight in one hand also. When the system breaks free you will know it first before anyone else.
Good luck!
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Old 10-14-2015, 09:20 PM   #20
Join Date: Mar 2013
Posts: 75
Sorry but I think you are in the group that are best served by taking your camper and your checkbook to the local dealer/service location and asking them to fix your problem.
Be sure to specify what problem you want fixed and get them to respond so you are sure they are only fixing what you want done and any additional fixes will be called for your approval.
This should not result in additional new problems due to improper solutions. At the end the dealer will probably be able to give you really good tips to prevent repeat calls on this particular problem.

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