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Old 01-13-2022, 09:02 PM   #21
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2014 27' FB International
Lewisville , Texas
Join Date: Sep 2015
Posts: 151
To clear debris from my valves, I capped off a six foot long garden hose and drilled four 1/8" holes in the cap at 12-3-6-9. I ran the hose into the drain outlet until it hit the valve, opened the valve and turned on the water to spray water into the seal groove's as I worked the hose back and forth and around with a spinning quick connector.

Using the natural curve of the hose allowed me to steer it left into one valve and right into the other one. It worked! I do that about once a year as a regular maintenance now.

Good luck.
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Old 01-14-2022, 08:14 AM   #22
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2012 25' FB Eddie Bauer
St.louis , Missouri
Join Date: Apr 2014
Posts: 33
Thanks JMickow for the photos. That was smart thinking to notice they weren't connected.
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Old 01-14-2022, 08:19 AM   #23
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2012 25' FB Eddie Bauer
St.louis , Missouri
Join Date: Apr 2014
Posts: 33
Thanks No Noize, Maybe I'm doing something wrong or maybe the plumbing and valves are in a slightly different setup but I can't get a clean out hose into the valve.
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Old 01-14-2022, 06:24 PM   #24
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2014 27' FB International
Lewisville , Texas
Join Date: Sep 2015
Posts: 151
Quote:
Originally Posted by nddstl View Post
Thanks No Noize, Maybe I'm doing something wrong or maybe the plumbing and valves are in a slightly different setup but I can't get a clean out hose into the valve.
You are getting lots of expert advice on this thread so far. I have been saving this info for future reference in case I am ever faced with valve replacement. The link to the pics and parts from ORMD was new to me and very informative, I purchase from them all the time.

I often easily figure out complicated problems, but the simple things are out of vision sometimes. My better half always makes fun of me by saying "The obvious eludes me". So here is my obvious suggestion.

Get down on your hands and knees, take the dump cap off and shine a really strong flashlight in there. You will see the plumbing sweeps on the left and right that you may choose to attempt a spray of water into. Then you can actually insert a spray device of your choosing into those openings if you want to try it.

Since it is all black inside it is really hard to see, might be better to look in there after the sun goes down.

My first experience with this happened to me at a campground when the black tank valve would not close by about 1/4". Since I had access to a large dump station platform that could be used by not making a big mess, I hooked up my short dump hose, opened the black valve and inserted a garden hose with the water on all the way into the dump hose with the end over the sewer opening.

Fortunately the obstruction was dislodged and we were able to continue our trip. It was not pretty, but got the job done and I was able to rinse the area so I left no mess for someone else. I now carry that spare gate valve mentioned above in case of problems away from home develop in the future.

Please keep this thread going so the rest of us may learn from your experience.

Good luck!
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Old 01-17-2022, 08:56 AM   #25
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2012 25' FB Eddie Bauer
St.louis , Missouri
Join Date: Apr 2014
Posts: 33
Update:

JStetson: Shut off valve and enzyme arrived last night. Ill let the tank soak and valve soak for about a week and provide an update. Thanks again for this.

After that process is finished Ill see if the black tank is water tight. If so Ill add the vegetable oil as Sandlapper suggested.

No Noize: I did what you suggested and can clearly see where the Y in the plumbing is located. (smart suggestion) After dumping the enzyme I am going to us a light so I can guide the clean out hose to the black tank shut off valve (with the valve closed), make a mark on the hose for reference and then open the black tank valve and turn the hose on. That way I will know how far the valve is from the opening and can feed the hose in an extra inch or two to make sure the water is spraying inside the valve body.
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Old Yesterday, 07:17 PM   #26
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2014 27' FB International
Lewisville , Texas
Join Date: Sep 2015
Posts: 151
Talking More Tank Pontifications

[QUOTE/]After dumping the enzyme I am going to us a light so I can guide the clean out hose to the black tank shut off valve (with the valve closed), make a mark on the hose for reference and then open the black tank valve and turn the hose on. That way I will know how far the valve is from the opening and can feed the hose in an extra inch or two to make sure the water is spraying inside the valve body.[/QUOTE]

That is exactly what I did, I made a mark on the hose for both valves. Also, since there is no way to rinse the grey tank, I insert the hose in a few extra feet to give it a good rinse.

To help cut down on all the splash back, I got one of these https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
and cut out the hose attachment large enough for the garden hose to be inserted.

I attach the Valterra Hydroflush to the Airstream dump outlet connection, then I attach the the dump hose to the Hydroflush, then insert the garden hose into the hole I cut into the Hydroflush. This method catches 99% of the backsplash and everything goes right down the dump hose.

I also used this camera httphttps://smile.amazon.com/gp/product/B081ZZS13W/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1://
to inspect the valve before and after rinsing.

Lastly, a trick I learned to attempt to prevent debris from sticking on the black valve seal after dumping at the campground, is as follows:

Black tank should be at least 3/4 full, grey tank should be at least 1/2 full.
  • Dump black tank first, leave black tank valve open
  • Lift the middle of the dump hose about six inches above the outlet on the Airstream
  • Open the grey valve all the way, wait for about three or four seconds and then close the black valve.
  • This forces two or three gallons of grey water back into the black tank, hopefully dislodging any debris that just happened to hang on the seal.

That's all there is to it Best of luck with your issue.
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