Atmospheric pressure relief valve

[cemill]

The black tank flush on our new Big Country 3650 rl would not work.
After. A little research I found the relief valve located behind the shower wall.
The valve was installed backwards from the factory. Cut the pex lines, reinstalled
The valve and the flusher works just fine.

 

[pday1213]

How did you know what to look for? How do you know it is installed backwards if I was to look at mine to check?

Thanks in advance.

The black tank flush on our new Big Country 3650 rl would not work.
After. A little research I found the relief valve located behind the shower wall.
The valve was installed backwards from the factory. Cut the pex lines, reinstalled
The valve and the flusher works just fine.

 

[katkens-DW]

way to go Ce !! Kenny and I were talking about it and he thought he had heard that was one place they put them. Our Sunnybrook was in the same place too..
I talked to Kenny and he says they have arrows on them .

 

[katkens]

Here is a link to whats in mine , the brass and white check valve both have arrows marking flow direction http://www.amazon.com/San-T-Flush-B...bs_auto_2?ie=UTF8&refRID=1Y1FEDW55E73M33BGAFR

 

[cemill]

I will try to attach a picture
If your black tank flush is not working, chances are it is the relief valve.

 

[wdk450]

Here is a link to whats in mine , the brass and white check valve both have arrows marking flow direction http://www.amazon.com/San-T-Flush-B...bs_auto_2?ie=UTF8&refRID=1Y1FEDW55E73M33BGAFR

I noted that the breaker valve assembly you bookmarked was $46, and at the bottom of the page among other options was this valve (without external fittings and check valve) for only $12. http://www.amazon.com/Cash-Acme-173...sbs_263_2?ie=UTF8&refRID=1EM92Q02HYY99A5DWF6D . I think you could get the external fittings to go to 1/2" PEX tubing for the $12 valve for much less than the difference cost of the $46 valve

I also saw the old plastic valve like the B&B Molders valve Heartland used to use, for $46, at the bottom of the first bookmarked page.

 

[sengli]

I had my relief valve on my last two rigs leak when attempting to flush the black tank. Shooting water into the wall behind the showers, into the basement. So I eliminated that valve and all of its associated extra plumbing. I no longer trusted it to not leak anymore.
Installed a brass one way manual valve in-line with the flush line and no more worries. So I could access the that valve and see what was happening all the time behind the basement wall, I also added an access door.