Pump -Rule 3700 12v Very high capacity extra heavy duty DC electric bilge pumps. The Rule 3700 pumps a huge 3700 US gallons per hour - 1 gallon per second at open discharge. They have extra heavy duty motors and are designed and built to give years of reliable service. Ideal pump for surfboats, large pleasure boats and commercial craft. Super reliable, commercial quality construction and performance. They include a snap-on strainer base for easy cleaning and ? tting, stainless screws and a clip to secure a ? oat switch to the pump. Requires a Rule ? oat switch (RWB19 or RWB98) to operate automatically. 3 year limited warranty.