Submersible pumps are available from one horsepower to 5.5 horsepower. One horsepower with a one-inch outlet for tanks. Half horsepower with a two-inch outlet. 2 horsepower with a one-inch outlet. 3 horsepower with a two-inch outlet. One horsepower with a 7-blade impeller and propellers. Two horsepower to five and a half horsepower. Impeller and propellers.