Ideal for simple holding tank pump outs. The macerator section grinds waste small enough to fit through the 1 hose barbed discharge port. Unit is self-priming 12 volt DC, and can empty a 30 gal. holding tank in less than 3 minutes. Amp/fuse: 15/20. The intake port with 1-1/2 NPT can be screwed directly into a tank's female discharge fitting.