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Old 10-11-2020, 04:14 PM   #1
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3051 black tank flush check valve location?

Anybody know where the check valve is located on a 3051? Black tank flush hook up is on curbside so Iím assuming somewhere in a bay near the water pump or inside a wall?
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Old 10-11-2020, 05:02 PM   #2
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Where ever it is it will be above floor level at least 6" above the toilet rim height. Check under the lav vanity.
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Old 10-11-2020, 05:18 PM   #3
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Check under the bathroom counter up high for one of these.

Could be all black too.
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Old 10-12-2020, 07:53 AM   #4
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Answers so far seem to talk about the tank venting valve, but I read the question as asking about a check valve for the black tank flush line.

I’d like to know the flush line check valve typical location, too. Our flush input fitting drips a little while after I flush out the black tank. It’s probably just dripping clean water, but annoying nonetheless.
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Old 10-12-2020, 08:03 AM   #5
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Quote:
Originally Posted by BehindBars View Post
Answers so far seem to talk about the tank venting valve, but I read the question as asking about a check valve for the black tank flush line.

Iíd like to know the flush line check valve typical location, too. Our flush input fitting drips a little while after I flush out the black tank. Itís probably just dripping clean water, but annoying nonetheless.
Your confused. This is a typical factory black tank cleanout plumbing install.
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Old 10-12-2020, 08:05 AM   #6
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the backflow/vacuum breaker could be as previously posted or this.
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Old 10-12-2020, 08:54 AM   #7
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Your confused. This is a typical factory black tank cleanout plumbing install.
Perhaps you’re right. Our previous motorhome had no such elevated valve. The hose was connected directly to the black tank, and the check valve was in the tank fitting itself. I have not located any such elevated check valve on our new Sunseeker, under the kitchen counter, lavatory vanity, etc.
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Old 10-12-2020, 09:02 AM   #8
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Originally Posted by BehindBars View Post
Perhaps youíre right. Our previous motorhome had no such elevated valve. The hose was connected directly to the black tank, and the check valve was in the tank fitting itself. I have not located any such elevated check valve on our new Sunseeker, under the kitchen counter, lavatory vanity, etc.
It was an after market install kit (tornado etc.) in the previous unit. Sometimes the factory installed valve is hidden in the least expected place but it will be above floor level if installed correctly. It will be very similar to this.
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Old 10-12-2020, 09:13 AM   #9
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It was an after market install kit (tornado etc.) in the previous unit. Sometimes the factory installed valve is hidden in the least expected place but it will be above floor level if installed correctly. It will be very similar to this.
No. Previous motorhome was a 1995 Fleetwood, and the hose connection for the black tank flush was a fitting mounted directly on the side of the black tank. It was factory installed that way.
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Old 10-12-2020, 09:43 AM   #10
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No. Previous motorhome was a 1995 Fleetwood, and the hose connection for the black tank flush was a fitting mounted directly on the side of the black tank. It was factory installed that way.
Wrong assumption on my part. That's what I installed in a 2000 Georgie Boy myself. Not FR factory installation done that way today.
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Old 10-12-2020, 09:45 AM   #11
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Quote:
Originally Posted by BehindBars View Post
Perhaps youíre right. Our previous motorhome had no such elevated valve. The hose was connected directly to the black tank, and the check valve was in the tank fitting itself. I have not located any such elevated check valve on our new Sunseeker, under the kitchen counter, lavatory vanity, etc.
I have read on this forum some models have the black tank flush anti-siphon/check valve located behind a shower wall. Tough to get to at best!
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Old 10-12-2020, 10:20 AM   #12
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Originally Posted by KJcachers View Post
Anybody know where the check valve is located on a 3051? Black tank flush hook up is on curbside so Iím assuming somewhere in a bay near the water pump or inside a wall?
Do not know where yours is however this is in my Ď18 2800. It is located under the bathroom vanity and behind a drawer. The exterior flush connection is below it. At least you can see what to look for.
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Old 10-12-2020, 10:41 AM   #13
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The last time I used the black tank flush I found water on the interior floor. It was clean water and it was in the area of the tank check valve. This is the first time this has happened. Is this the first sign of a failed valve? It looks just like the picture Duckogram posted and is located behind the draws of the wardrobe next to the bathroom.
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Old 10-12-2020, 04:26 PM   #14
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The back flow valve on our Columbus Black Tank Flush is located inside the wall behind the shower stall. A real PIA if I have to replace! After turning off the water source for the black flush, there is a fair bit of water that drains back out to the curb, this is water that is in the PEX from the back flow valve to my connection Point. Fortunately, the water that drains back (Invariably on my hands as I undo the hose connection) is clean! Any water In the PEX from the back flow valve to the sprayer, drains into the black tank.
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Old 10-12-2020, 05:05 PM   #15
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On the 3051 the vacuum check thingy is behind a screw off panel in the forward most cabinet, bedroom, pax side. Open it up and the valve is right there. Very easy to get to or replace.

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Old 10-14-2020, 12:51 PM   #16
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not sure why you need to know this.
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Old 10-14-2020, 01:08 PM   #17
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not sure why you need to know this.
Because they can stop working and need to be replaced.

Or as many people have reported, they can be installed backwards from the factory.

It's never a bad idea to know more about your RV and where things are located and how they work.
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Old 10-14-2020, 02:58 PM   #18
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Because they can stop working and need to be replaced.

Or as many people have reported, they can be installed backwards from the factory.

It's never a bad idea to know more about your RV and where things are located and how they work.
True, I learn something new every time we go somewhere. Remember an Expert is someone that is done learning...
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