I drive a small Class A, but know little or nothing about the bigger bus styles and equipment. I just saw a article about thieves sucking sewage out of a big RV instead of fuel as they expected. Is that even possible?? Is there any type of opening into the black tanks that could be accessed with a siphon hose?? On ours the only access would be through to vent line on top.

I've read this story a few times. I think it's just an urban legend.I don't know of any opening you could use to siphon from the black or grey tank.Maybe RV's from the 70's had some sort of access? I don't know what it's purpose would be.

I've read this many times over the years on the forum. I too think it's just an urban legend. I cant imagine any access to the tanks that would be mistaken for a fuel fill.

Not on ours. It's locked in the wet bay. Can't imagine someone confusing it if possible.But I'd love to watch that happen!! If it were thieves of course.

Johno02 wrote:I drive a small Class A, but know little or nothing about the bigger bus styles and equipment. I just saw a article about thieves sucking sewage out of a big RV instead of fuel as they expected. No at least not on any RV I have ever seen. You have the following openings into the black tank.Vent pipe (up on roof no thief is gonna think that's a fuel port) Toilet.. Dump valve (on bottom).. Now fresh water. That could be confused but never black .

Only if you hooked the siphon hose to the waste valve. Even then waste is discharged via gravity so no, it's a myth that makes for a funny story. It won't work with a Y connector as in the movie RV either....but it makes everyone smile....Dennis

Is this actually possible?? | Good Sam Community

wa8yxm
Explorer III
Mar 29, 2019
Johno02 wrote:
I drive a small Class A, but know little or nothing about the bigger bus styles and equipment. I just saw a article about thieves sucking sewage out of a big RV instead of fuel as they expected.

No at least not on any RV I have ever seen. You have the following openings into the black tank.
Vent pipe (up on roof no thief is gonna think that's a fuel port) Toilet.. Dump valve (on bottom).. Now fresh water. That could be confused but never black .
et2
Explorer
Mar 29, 2019
Not on ours. It's locked in the wet bay. Can't imagine someone confusing it if possible.

But I'd love to watch that happen!! If it were thieves of course.
opnspaces
Navigator II
Mar 29, 2019
I've read this many times over the years on the forum. I too think it's just an urban legend. I cant imagine any access to the tanks that would be mistaken for a fuel fill.
gbopp
Explorer
Mar 29, 2019
I've read this story a few times. I think it's just an urban legend.
I don't know of any opening you could use to siphon from the black or grey tank.
Maybe RV's from the 70's had some sort of access? I don't know what it's purpose would be.

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