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Old 07-10-2018, 12:07 PM   #1
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Question Black Tank Flush valve location?

Our 2008 Georgetown XL 378 has had intermittent "black tank flush" issues for a few months now. The past week there is NO flush at all! I've replaced the check valve located in the washer/dryer closet. (We're using that space for hanging clothes and keep our eyes open for a good laundromat.)
I've contacted Forest River, "they" think the flush valve might be mounted on the end of the black tank behind/beside the hot water tank?
Has anyone found the valve in that location? If so, how did you separate the outer panel from the water tank enclosure?

Thanks
Ralph
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Old 07-11-2018, 07:42 AM   #2
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Have you tried to use a good tank cleaner and let it sit for awhile to see if that will clean the nozzle of the flush, might be worth a try before you tear things apart, just a thought.
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Old 07-11-2018, 10:33 AM   #3
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Thanks. We are full timers for the past 4 1/2 years, so the tank is flushed every 3-4 days. We also use the product "Porta Pak"with every tank.

On another thread someone had a very similar problem and found the inside of the nozzle plugged, looked almost like sawdust.

I was hoping someone could confirm, "Yup" that's where it is located.
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Old 07-11-2018, 10:48 AM   #4
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Yes the nozzle is located behind the water heater. You won't have to pull the heater but you will have to remove the brackets (underneath), screws, etc. from the heater door (which swings up) (not the heater access door) to get at the black tank nozzle. It's a pia and time consuming but not difficult.
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Old 07-13-2018, 05:29 PM   #5
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Yes this has happened back when I 1st had my rig.
Too much paper in the tank and somehow it came back into the nozzle and clogged it that it wouldn't allow water to pass.

I had to remove and clean it and reinstalled the nozzle.

To do this you must:

1. Take the 4 long screws out from the hot water tank frame.



1a. You have to remove the molding that is painted all around.
It is probably secured with silicone so you have to figure out how to remove that.


1b. After that molding is removed you need to remove the additional screws on the right and left of the tank.



2. Now go underneither the big compartment door and unscrew the bracket from below.
They are 2 L brackets but all you need to do is unscrew from chassis.



3. When this is dome. carefully raise the large compartment door up as it is hinged at the top. Get a broom stick or something to hold it up .
It doesn't come off and should only go up 90 degrees.

4. Look inside at the very top right corner and you will see a water line(blue) going into a 90 degree elbow then into the tank. (upper Right)
Unscrew as this is a tight space.
After you have that off you can unscrew the nozzle from the tank and clean and reinstall everything.

Sorry no pictures but it is a pain to get to it and clean.
Good luck
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Old 07-19-2018, 06:39 PM   #6
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Thanks Iggy. I followed your instructions, found my ever handy Exacto Knife, cut out the silicone around the door, found those extra screws and ten minutes later cleaned out the nozzle. I made some minor modifications so the next time I won't have to cut out that silicone. I'll be able to access the side screws easily.
Why didn't the engineers think that process through originally???

Ralph
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Old 07-19-2018, 06:42 PM   #7
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Ralph glad you fixed it.
I surprised my self on the procedure as it is a bit weird as yo said " What were the engineers thinking?"

Did you take any pictures?
What the nozzle clogged with toilet paper?
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Old 07-20-2018, 05:23 PM   #8
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Quote:
Originally Posted by Iggy View Post
Yes this has happened back when I 1st had my rig.
Too much paper in the tank and somehow it came back into the nozzle and clogged it that it wouldn't allow water to pass.

I had to remove and clean it and reinstalled the nozzle.

To do this you must:

1. Take the 4 long screws out from the hot water tank frame.



1a. You have to remove the molding that is painted all around.
It is probably secured with silicone so you have to figure out how to remove that.


1b. After that molding is removed you need to remove the additional screws on the right and left of the tank.



2. Now go underneither the big compartment door and unscrew the bracket from below.
They are 2 L brackets but all you need to do is unscrew from chassis.



3. When this is dome. carefully raise the large compartment door up as it is hinged at the top. Get a broom stick or something to hold it up .
It doesn't come off and should only go up 90 degrees.

4. Look inside at the very top right corner and you will see a water line(blue) going into a 90 degree elbow then into the tank. (upper Right)
Unscrew as this is a tight space.
After you have that off you can unscrew the nozzle from the tank and clean and reinstall everything.

Sorry no pictures but it is a pain to get to it and clean.
Good luck
I have the same problem but am confused by this thread and missing something. What does the water heater have anything to do with the black water tank flush line? Iím thinking the line goes from the hose connection (next to the fresh water tank fill connection) through the check valve and to the spray nozzle in the black water holding tank. I have a 2008 378TS and in my laundry closet there is a line with an elbow in it, but doesnít appear to be a check valve.
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Old 07-20-2018, 05:53 PM   #9
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GJSinDBQ

After the line goes thru the check valve in the bedroom closet it goes into the black tank in the same compartment the hot water tank is.
Inside that compartment in the upper right hand corner is the actual nozzle that is clogged.

Does that help any?
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Old 07-20-2018, 07:46 PM   #10
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Black Tank Spray Nozzle Location

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Perhaps these three photos will help:
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