b'Sleek fins are not just for looks! All those ribs increase the surface area that is touching that nice cool sump water - providing extra cooling for the motor. The cooler the motorthe longer you can expect it to last! Liberty Pumps 230 and 450-Series pumps are 225% more efficient at cooling the motor than our cast iron models. Now thats cool running!Wheres the beef?Its in our model 257. The classic 1/3 hp sump pump is loaded with features. Combine a one-piece cast iron body with advanced VMF switch technology and you have a winning combination. All the weight, performance and features of a true classic. Put it in your pit and forget it.Who wants MORE seals? Not Liberty Pumps!When your pump spends its life under water, fewer seals mean greater reliability. Our most popular models feature the VMF (vertical magnetic float switch). This advanced design eliminates old-school toggle switches which require an extra rubber boot to seal the switch arm extending from the switch cover. Over time, those boots can crack, dry rot or just plain wear outallowing water into the switch and killing the pump.With the VMF design, the switch is operated by a magnet - no switch arm and no extra seal!Want efficiency? Get off the amps!Liberty Pumps sump pumps feature PSC (permanent split capacitor) motors with lower amp draw. This motor style, combined with efficient impeller and hydraulic design, gives Liberty Pumps the advantage when it comes to reducing power consumption but not performance. Up to 40% less electrical usage compared to other designs of the same horsepower. Multiply that by the number of times your pump may cycleand you could have some serious savings on that electric bill!'