Yup. I have a stinky slinky that came with the AS still in the tube underneath--too lazy to pull it out and toss it. No matter how good they are, they all eventually get pinhole or worse leaks.
I use a sewer solution plus a couple 3 foot hoses connected to a two-way hose valve on the end of my longer utility (read dirty non-potable) hose. One of the three footers has the sewer solution quick connect on it, the other goes to the black tank flusher connection. When I dump, I ca easily control tank flusher and sewer solution water jet from one spot. Flush and dump black tank enough time that it's squeaky clean, then shut its dump valve and do the gray tank after I flush the sewer solution fitting and clear extender I have to use. Then dump and flush gray tank.
Nice and tidy, and all this fits nicely in the bumper storage bin. Tanks are nice and lean because I can see what is going down the drain and how clear the effluent is by looking at the sewer solution connector and the clear extension.
My tank valve bodies and handle spacing made it hard to install the sewer solution to the dump port, so I picked up a short transparent Valterra extension. It's more or less permanently on the sewer solution fitting now. Makes it easy to hook up, and see what's going on.
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'The Silver HamShack' (2007 International 22FB CCD 75th Aniversary model)
Multiple Yaesu Radios inside and many antennae sprouting from roof, ProPride hitch
2012 shortbed crewcab 4x4 Toyota Taco TV with more antennae on it