WB Series water pumps replace the WN, WP and WD general-purpose pumps. The company's GX engines power the WB30 and WB20 pumps and provide 5.5 and 4.5 horsepower, respectively. The engines feature Oil Alert to help prevent damage due to low oil levels. Maximum discharge capacity for the WB30 is 275 gpm and a maximum head of 83 feet. The WB20 delivers 153 gpm and a maximum head of 94 feet.