camperdave wrote:
If it's flat, the Sewer Solution instructions say you can go up to 100' if you use 1" pvc. If it's downhill, you can go as far as you want.
Personally I used to use a Sewer Solution to pump into a sewer cleanout about 2' above tank level, and it worked great. From there of course it just gravity fed all the way down to the street (and eventually the sanitation department...) I'd think if it IS a flat run, you could build a ramp at the trailer of 2-3 feet and used the sewer solution to pump the contents up to a 1-1/2" pvc pipe. From there it should make it the 150 feet to your cleanout via gravity. By the time it all gets past the nozzle, it's pretty pulverized and liquidy, there's no chunks to push through the pipe.
If it's a flat run, and you're actually going to rely on gravity then it needs to be just over 3' high (37.5", 1/4" of slope per linear foot of run)