because you have only 1 waste tank you could use a laundry pump 2 " in and 2 " out and pump it any were to the dump tank dave
Is that an aluminum tank?
pump is like this but mine has a 2 " in and 2 " out outlethttp://www.homedepot.com/p/AquaPro-1-3-HP-Utility-Sink-Pump-55011-7/206852252works great sorry about the pictures and photo crap dave
Was easier than I thought