Pump Marvel is a hot tub drain pump that uses pressure from a garden hose, rather than electricity, to pump water. While not intended to outperform the speed of electric submersible hot tub drain pumps, Pump Marvel is great in situations where you can’t use electricity (Pump Marvel recently saved one person’s basement from flooding when the power was out and the sump pump wasn’t running). It also works great in areas where, for safety reasons, it may be preferred not to mix water and electricity, such as draining hot tubs and taking the water off of winter pool covers.