Re: How do I empty my black water tank?
I had the same problem a few years ago with our Sun Runner, the only pumpout within 100 miles was busted--
So I bought a "whalepump" from West Marine...
The suction line is typical flexible home-type drain plumbing, my exit hose is from an old wet-dry vac (it was handy at the time

)
-The male threads on this typical plastic elbow will fit any standard marine waste fitting---
--making it cheap and easy to rig up your own waste pump plumbing. Yes, it seals well and will pump out uphill.
The whalepump worked great, but of course a macerator is much easier than hand pumping for sure, and I highly recommend one. The same 'only waste pump within 100 miles' is still always broken, so for years I've pumped out our houseboat's black tank with a macerator and $8 worth of cheap Home-Depot drain plumbing. (I have a 22 gallon portable RV dump tank I pump into, then dump THAT at the RV dump).
I still keep the hand pump around- when our starboard fuel tank leaked 40 something gallons of gas into the bilge of the SkipperLiner our first year, the whalepump is what pumped it all out, the gasoline didn't affect it a bit. Still works like new...