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

[LBR]

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

Correct on replacing the check valve...I would probably do it as well when mine give me problems.

While it presents itself as a fully functioning device to laymen, should the spring break or a foreign object wedges the check from closing back up, it is then mearly a fitting in the line as the check isn't functioning anymore.

This is most undoubtedly why the factory is required to use the ASV as it is an approved device and any check valve isn't, unless it is an RP assembly....and we don't want those things in our RVs...lol.

 

[WillyBill]

Correct on replacing the check valve...I would probably do it as well when mine give me problems.

While it presents itself as a fully functioning device to laymen, should the spring break or a foreign object wedges the check from closing back up, it is then mearly a fitting in the line as the check isn't functioning anymore.

This is most undoubtedly why the factory is required to use the ASV as it is an approved device and any check valve isn't, unless it is an RP assembly....and we don't want those things in our RVs...lol.

On the other hand....

"a foreign object wedges" the ASV from closingis just as likely to make it fail too? Just sayin...

WB

 

[LBR]

On the other hand....

"a foreign object wedges" the ASV from closingis just as likely to make it fail too? Just sayin...

WB

Correct...when that happens, water will flow out of the now opened up valve and not to the sprayer by design....it does it's job by eliminating a backflow incident and makes a huge water mess for someone to clean up plus make repairs to the ASV, however the owner chooses.

 

[wrgrs50s]

My Sundance did not have an access panel. I removed the shower water valves and it was right beside the other water lines. It was difficult to get to with such a small area but I bypassed it so I no longer have to worry about it. I know technically you should have one but the chance of it ever backflowing into the public water supply is practically nill. It's required by law for the manufacturers to eliminate any chance, but I just don't see replacing it.

 

[WillyBill]

This is what I'm using - just screws into the water inlet for the Black flusher - no more problem.


https://www.amazon.com/Valterra-A01...21&sr=8-1&keywords=valterra+anti+siphon+valve


WB

 

[Bogie]

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

While you are not using that dedicated hose for potable water, you are still putting the water supply at risk. So, it still presents the possibility of contaminating the water source from the spigot valve back into the system.

For those who use a hose bib style back flow preventer, They may work, but it that were a viable solution, you can be sure that Heartland, or any other manufacturer would be using that more cost effective solution instead of the anti siphon. I'm reasonably sure it doesn't qualify.

 

[Bogie]

For those who use a hose bib style back flow preventer, They may work, but it that were a viable solution, you can be sure that Heartland, or any other manufacturer would be using that more cost effective solution instead of the anti siphon. I'm reasonably sure it doesn't qualify.

I did a little checking on this to confirm. The black tank presents a Category 5 risk level (human waste).

A Category 5 requires an air gap, not merely a check valve. This is the reason for the anti siphon air gap is installed by Heartland. If they fail, they should be replaced, not removed.

 

[TravelTiger]

My Sundance did not have an access panel. I removed the shower water valves and it was right beside the other water lines. It was difficult to get to with such a small area but I bypassed it so I no longer have to worry about it. I know technically you should have one but the chance of it ever backflowing into the public water supply is practically nill. It's required by law for the manufacturers to eliminate any chance, but I just don't see replacing it.

That's where mine was in my 2010 ElkRidge. If you don't have a access portal, remove the faucet, and you should find the valve in there.


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