Now featuring a sealed design, these pumps include run-dry protection with a self-priming flexible impeller and stainless steel wearplate. Self-priming to 5' when wet and grinds waste to 1/8" or smaller. The inlet port has a 1 1/2" hose barb combined with 1 1/2" male thread to screw directly onto a tank flange. Use 1"?1 1/2" hose adapter (Model 3274123) for 1 1/2" sanitation hose.