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

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.
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.
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.
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 .
Executive45
Explorer III
Mar 29, 2019
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
Ivylog
Explorer III
Mar 29, 2019
Maybe the water tank fill with the locking door and plastic cap but not the waste tanks.
downtheroad
Explorer
Mar 30, 2019
Sure it's possible if you are stupid....
I say, Welcome to it."......:S
hotjag1
Explorer II
Mar 30, 2019
I've read this scenario numerous times over the years. If you think about it, the holding tanks and slide valves are down low near the bottom of a coach. No need to "siphon" just pull the slide valve and have a funnel handy to direct the flow wherever you want it. Fuel fill inlets are usually up much higher on the side or rear of a coach. I say urban legend!
RedRollingRoadb
Explorer
Mar 30, 2019
https://www.snopes.com/fact-check/dreaded-unleaded/
oldave
Explorer
Mar 30, 2019
I have heard of thieves punching a hole in the fuel tank and using a couple
of buckets .
That might be a way they could possibly puncture the wrong tank on some rigs .

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