The ShurTrax Perfect Siphon Pump provides a quick and easy way to drain any ShurTrax. It attaches to an outdoor faucet and a garden hose connected to the ShurTrax fill/drain valve, using siphon power generated by the water flow to remove water from your ShurTrax. The Siphon Pump is included at no charge with all new Auto/SUV ShurTrax purchases, and is available for all other models as an accessory.