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Old 02-25-2014, 09:22 AM   #1
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HELP! Black tank flush nozzle clogged!

My black tank flush nozzle is completely clogged up! I let the black tank get completely full before dumping and I guess the nozzle couldn't take it!

Does anyone have any ideas on how I can clear it? Thanks!
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Old 02-25-2014, 09:30 AM   #2
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Joe, is this the one you connect a hose to in order to flush it out?

If so, you might want to try using one of those "wands" which you connect the hose to and stick down inside the toilet. Maybe a good rinsing with that will help?

Good luck.

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Old 02-25-2014, 09:36 AM   #3
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Yes, the inlet is in the wet bay and I connect a hose to it to flush as I dump. That's a good idea to try the nozzle down the toilet! I'll pick one up today and try it! Thanks!
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Old 02-25-2014, 09:58 AM   #4
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Joe..I don't know if adding more water to the black tank will loosen whatever is plugging the valve. My suggestion (and it is a messy one) is to take a short sewer hose and hold it up higher then the black tank. This will allow you to open the valve without worring about the tank emptying. One the valve is opened try using a snake to clear the line/valve. If you feel the clog break up remove the snake and close the valve. Now the messy part. You will need to get the hose back onto the dump receptacle, there will be some liquid in the hose. A five gal. pail may catch enough to allow you to hook up again with a huge mess. I know this sounds like a scene from the movie RV, but it is my best suggestion. Good luck!!
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Old 02-25-2014, 10:03 AM   #5
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Quote:
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My black tank flush nozzle is completely clogged up! I let the black tank get completely full before dumping and I guess the nozzle couldn't take it! Does anyone have any ideas on how I can clear it? Thanks!
The nozzle is in the side of the tank on the curb side. Open that compartment door. May be secured with fasteners at the bottom edge. You will have to remove the nozzle to clean out. I cleaned mine twice and then I used a drill to open up the holes to a larger size. Still get a good spray pattern but no more clog.
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Old 02-25-2014, 10:05 AM   #6
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If the wand does not rectify the issue check the plumbing diagram for your coach (if they are available) and see if there is a anti siphon/backflow valve in the hose from the inlet in the wet bay to the spray head. I had a similar issue in my Winnebago Journey several years ago and this valve had failed not allowing water to flow into the tank. In my case the valve was inside a wall and not accessible without cutting a hole in the wall so I by passed it and installed a check valve in the wet bay and re-hosed the sprayer. I did a write up on the process that you can find by searching my posts in the Winnebago forum. (Sorry, for some reason I was not able to import my post for you)
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Old 02-25-2014, 10:09 AM   #7
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Quote:
Originally Posted by MSHappyCampers View Post
My black tank flush nozzle is completely clogged up! I let the black tank get completely full before dumping and I guess the nozzle couldn't take it!

Does anyone have any ideas on how I can clear it? Thanks!
Here is a suggestion that worked for me one time. I had the same problem, clogged flush nozzle. It would not budge. I was using my regular 3" flexible hose but I also have a "sewer solution" Sewer Solution for sale from PPL Motor Homes - PPL Motor Homes that I use when I am hooked up for longer periods of time. The Sewer Solution is all water powered and has a back wash function that you can direct a flow of water back in to the flush nozzle. Once connected I turned on the back flush a few times and the clog was broken. You may find someone who is camped where you are that has a sewer solution and try this. Good luck
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Old 02-25-2014, 10:23 AM   #8
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The nozzle is in the side of the tank on the curb side. Open that compartment door. May be secured with fasteners at the bottom edge. You will have to remove the nozzle to clean out. I cleaned mine twice and then I used a drill to open up the holes to a larger size. Still get a good spray pattern but no more clog.
Yup! That is the easy way.
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Old 02-25-2014, 10:23 AM   #9
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This could have the makings of a real funny movie...
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Old 02-25-2014, 06:29 PM   #10
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Quote:
Originally Posted by MSHappyCampers View Post
My black tank flush nozzle is completely clogged up! I let the black tank get completely full before dumping and I guess the nozzle couldn't take it!

Does anyone have any ideas on how I can clear it? Thanks!
You might try air pressure - your rinse hose is putting maybe 40 PSI - could try a bit more with air if you have a compressor. The draw back is to much pressure could cause the hose to disconnect. Just a thought.
Good luck
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Old 02-25-2014, 09:07 PM   #11
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Quote:
Originally Posted by TonyDi View Post
Joe..I don't know if adding more water to the black tank will loosen whatever is plugging the valve. My suggestion (and it is a messy one) is to take a short sewer hose and hold it up higher then the black tank. This will allow you to open the valve without worring about the tank emptying. One the valve is opened try using a snake to clear the line/valve. If you feel the clog break up remove the snake and close the valve. Now the messy part. You will need to get the hose back onto the dump receptacle, there will be some liquid in the hose. A five gal. pail may catch enough to allow you to hook up again with a huge mess. I know this sounds like a scene from the movie RV, but it is my best suggestion. Good luck!!
Tony, it's not the valve that's clogged, it's the flush nozzle. thanks anyway!
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Old 02-25-2014, 09:11 PM   #12
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You guys have given me some excellent ideas which I will try! I'll let you know which one works! I picked up a Swivel Stick flushing wand from CW today but I think I will try some of your ideas before using it. Maybe I can save that $21.
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Old 02-25-2014, 09:21 PM   #13
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Quote:
Originally Posted by Steve Ownby View Post
The nozzle is in the side of the tank on the curb side. Open that compartment door. May be secured with fasteners at the bottom edge. You will have to remove the nozzle to clean out. I cleaned mine twice and then I used a drill to open up the holes to a larger size. Still get a good spray pattern but no more clog.
Sorry to jump on the band wagon here, but my flush nozzle clogged in the last year or so and I assumed it was a lost cause. I am thinking I picked up some algae that lead to my problem. I'm just not understanding what you are suggesting here.

Are you saying the holding tanks span the full width of the motorhome? I am not aware of any panel on the curb side that I can open to access the tanks. I think they are opposite the propane tank, which is on the curb side forward of the rear wheels. Maybe I should crawl underneath and see what I can find?
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Old 02-25-2014, 11:42 PM   #14
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Joe.....Steve Ownby gave you the correct answer. This is an age old issue with the Monaco sprayers. Open the panel on the passenger side, just in front of the rear wheels. There is no latch on this panel. Remove the two screws on the underside and use a broom handle to hold the panel up.

You don't need to remove the sprayer....just remove the hose and take a 1/8" drill bit and drill several times down into the sprayer. This will open the sprayer up and you'll never have the issue again.
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