Black Water Flush causes water to pour out of the bottom of RV

[scriv968]

When I connect a hose to the Black water Tank Flush port, water leaks out of the camper. I traced the water lines as far a I could, it runs up thru the wall near the toilet area.
I do not see an access panel to inspect the Anti Siphon Valve. Do I need to cut one ?

 

[cookie]

What model is your RV? This will help in locating your plumbing.
It sounds like the anti-siphon valve has cracked or a PEX line came off.

Peace
Dave

 

[LBR]

Do you have a round access plug in the shower...if so, check there.

 

[scriv968]

What model is your RV? This will help in locating your plumbing.
It sounds like the anti-siphon valve has cracked or a PEX line came off.

Peace
Dave

2009 Heartland Sundance 29RL When I purchased the RV new, I asked if I should use a pressure regulator when using the tank flush, i was told that more pressure was better when it came to flushing the tank. As I recall this happened when I was at home with 50 psi city water.
now I just need to find access to it.

 

[scriv968]

Do you have a round access plug in the shower...if so, check there.

I do not, The shower is on one side and the toilet is on the other side. I can trace the two hoses going up into the wall on the toilet side of the camper.
I can see water flowing in one pipe that goes up, the other pipe the water goes down, I suspect it then goes into the black tank.
When the water flows thru the pipes it also drips/pours and eventually leaks to the ground.
I can hear the flush spinning so it is not a complete break in the line.
I may need to cut an access hole somewhere.

 

[Abear79]

I have 2 tanks. For front tank I do have a panel in the basement. which I did have to reconnect once. The same thing happened to me. But for my back tank I have to pull out my draws in my kitchen. Very tight space. We have 60 psi in my city and only had that happen once when the Rv was new. Im hooked up 90% of the time for 3 years now.

 

[LBR]

I do not, The shower is on one side and the toilet is on the other side. I can trace the two hoses going up into the wall on the toilet side of the camper.
I can see water flowing in one pipe that goes up, the other pipe the water goes down, I suspect it then goes into the black tank.
When the water flows thru the pipes it also drips/pours and eventually leaks to the ground.
I can hear the flush spinning so it is not a complete break in the line.
I may need to cut an access hole somewhere.

Yeah, sounds like post #2 is what happened with your AVB...your quest is on to find a proper way to it without cutting holes.

 

[cookie]

You could do what some here have done, and that is to eliminate the anti- siphon valve by cutting the two pieces of PEX tubing and splice them together with a Sharkbite check valve.
Its what I will do if mine ever leaks.

Peace
Dave

 

[JohnD]

Do you have a round access plug in the shower...if so, check there.

Anyone have a photo of this access panel in the shower?

 

[danemayer]

Anyone have a photo of this access panel in the shower?

John,

It's a screw out deck panel like this one from Amazon. Found on some models; not on others.

 

[JohnD]

Where is it typically located in the shower?

 

[danemayer]

Where is it typically located in the shower?

On Bighorn and similar models, it's located so it can provide access to the shower pex connections and to the anti-siphon valve. So it's typically just below the shower handles. I've attached the back side photo from a BH.

 

[Lynn1130]

Is this trailer still under warranty?

 

[cookie]

Is this trailer still under warranty?

It's a 2009.

Peace
Dave

 

[Lynn1130]

Thanks, I missed that.

 

[Bogie]

You could do what some here have done, and that is to eliminate the anti- siphon valve by cutting the two pieces of PEX tubing and splice them together with a Sharkbite check valve.

I would not remove the anti-siphon valve. The reason it's there is to protect the water supply from potential contamination, including the hose you use to connect to it.

 

[avvidclif]

I would not remove the anti-siphon valve. The reason it's there is to protect the water supply from potential contamination, including the hose you use to connect to it.

Explain? My rinse system is not connected to the fresh water supply anywhere. The hose I use is dedicated to that purpose only.

 

[JohnDar]

Once the ASV fails and you have serious water damage, you'll reconsider reinstalling another in a blind wall cavity. I now have two check valves in my system and enough elevation in the line to not pose a problem.


Sent from my iPad using Tapatalk

 

[LBR]

Explain? My rinse system is not connected to the fresh water supply anywhere. The hose I use is dedicated to that purpose only.

The sprayer in the black tank is in contact with sewage and your hose can be connected to a potable water source for rinsing. This immediately constitutes what is called a cross connection and necessitates a proper backflow assembly/device....what everyone refers to as the anti siphon device is an air gap device that breaks to atmosphere, just like house hose bibs for instance. This protects the water source should a handful of events align perfectly that could cause a backflow incident....which by definition is water flowing in the wrong direction.

Google "cross connection" and "backflow" for more information on how your potable water sources are protected to save widespread disease and death.

 

[WillyBill]

A lot of us here just eliminate the ASV and install a screw-in check valve (which will function as a backflow preventer) in the UDC where you screw on the water hose to the black tank flusher. They only cost a couple of dollars and you are done with this permanently. Replace the ASV and you WILL be replacing it again in the future - they do not last forever (cheap plastic devices). Just MHO.

Regards,

WB