Now featuring a sealed design, these pumps includerun dry protection with a self-priming flexible impeller and stainless-steelwear plate. Self-priming to 5' and grinds waste to 1/8" or smaller. Pumps 12gpm. Theinlet port has a 1 1/2" hose barb combined with 1 1/2" male thread to screw directly onto a tankflange. Use 1"-1 1/2" hose adapter (Model 3274123) for 1 1/2" sanitation hose.