T&T: Holding Tank

[Ken Bloomfield]

 I also agree with the use of a diaphragm pump for sewage transport. 
However, there is an alternative to the Sealand pump, and that is the
Johnson pump.  It is a diaphragm pump made for sewage use with a long
throw diaphragm to clear any solids that might be compromising the
valves.
At this URL http://tinyurl.com/9tu4sc you can see this pump.  I purchased
this after getting fed up with replacing impellers in my Jabsco macerator
pump.   Best move I ever made.  Pump costs about $180 and is very nicely
made. 
Ken Bloomfield