Suctioning/Pumping out black/grey tanks

[MrMark52]

Well, wasn’t going to reply - but realizing this is getting into some interesting physics discussion and away from the OP’s concern - and that I will admit I did make some statements in my response above that I now realize were incorrect, I’ll bow out of the discussion at this point.

Bottom line - don’t use a direct connection between your coach and a honey truck without an air break as mentioned above or you risk damage to your hoses and your tanks.

[TandW]

Originally Posted by MrMark52

Well, wasn’t going to reply - but realizing this is getting into some interesting physics discussion and away from the OP’s concern - and that I will admit I did make some statements in my response above that I now realize were incorrect, I’ll bow out of the discussion at this point.

Bottom line - don’t use a direct connection between your coach and a honey truck without an air break as mentioned above or you risk damage to your hoses and your tanks.

A 3x3x2 sanitary wye with 2 inch check valve might work for full-time service. Or just a bucket as mentioned. But the bucket trick might be prone to splashing.