The Siphon Cover Pump by Midwest Canvas is a non-electric pump that will allow you to remove water from the top of your above ground swimming pool winter cover. Each package includes a drain, siphon pump and 15 ft of hose. To use, simply connect the pieces together, place the drain on the top of your pool cover where there is the most water, squeeze the siphon until water starts to flow through the tubes. The water will stop flowing once the cover is drained. No electricity required.