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Grey Tank Drain blocked

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Randy's post made me think. Isn't there a vent from the grey tank that goes up to the roof? If so, can't you get your tube down that vent to pump it out?
There is and I may try that today if Newmar continues to be as useful as a box of rocks.
Here is the drain and vent schematic Newmar sent me a few months ago when I initially started complaining about a slow drain in grey and asked for the schematics.
 

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There is and I may try that today if Newmar continues to be as useful as a box of rocks.
Here is the drain and vent schematic Newmar sent me a few months ago when I initially started complaining about a slow drain in grey and asked for the schematics.
Looking at the specs, the turns don't look all that bad. Pushing through that long stretch at the end might be a bit of trouble though.
 
Looking at the specs, the turns don't look all that bad. Pushing through that long stretch at the end might be a bit of trouble though.
I agree. Coming at it from the grey vent looks doable. I have plenty of tubing so i may end up on the roof today if there’s still no availability and the flush king approach doesn’t set me free either.
 
@Jim great suggestion. @MapNerd try this first. It doesn't repair the problem, but if Jim's idea works, it would be a stop-gap until the mobile tech arrives. Tubing and a pump is all you'll need. The idea of sucking on the tube to create a siphon is quite disgusting.
 
Another thing @MapNerd, you might want to open the grey valve and using a shopvac, put some suction on grey vent. It might just suck the obstruction off the drain and let the water out.
 
@Jim great suggestion. @MapNerd try this first. It doesn't repair the problem, but if Jim's idea works, it would be a stop-gap until the mobile tech arrives. Tubing and a pump is all you'll need. The idea of sucking on the tube to create a siphon is quite disgusting.
Haha. I have a transfer pump.
 
Please be sure to

80's television GIF by vhspositive
 
Please be sure to

80's television GIF by vhspositive's television GIF by vhspositive
I’m sure a video of me getting hosed down by my grey tank would be much appreciated. If it comes to that, you shall have it
 
They once called it black gold. I think you’re drilling for gray gold.

oil flowing GIF by University of Alaska Fairbanks
 
Comedic relief appreciated
 

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