For engines from 100-450 HP. This new line of oil change systems allows servicing multiple engines, transmissions and generators with one pump and from one place. Each valve is clearly labeled (labels provided).Operation is intuitive. The flow direction is the same as the switch. After draining the used oil, flip the switch to fill with clean oil. 1/2" NPT female valve fittings 1/2" SAE male flare pump connector fitting The used oil will flow in to the waste container. All models utilize gear pump and will transfer oil at up to 3 GPM. The compact size and economical price makes it a good choice for the yacht owner. Main features are: * 1/2" chrome plated brass ball valves 1/2" NPT ports * Reversing switch for high speed oil transfer to and from containers. * Switch guard protection * Ease of operation - open valve and flick the switch! * Saves money and time on oil changes * No messy cleanups * 2-5 valve systems available FREE SHIPPING inside Cont. USA and Canada Two Valve oil Change System 12 or 24 Volt $542.00 3 Valve Oil Change System 12 or 24 Volt $617.00 4 Valve Oil Change System 12 or 24 Volt $667.50 5 Valve Oil Change System 12 or 24 Volt $710.50 If you have any questions, please email them to: info@enginegearonline.com