90� elbow adapters are designed for rigid pipe installations of Sump and Utility Pumps. Adapters snap onto the discharge port without the need for a hose clamp. Adapts 1,800 GPH pump to 1″ NPT. 90� Elbow Adapter. Designed to be used with Rule Pumps and thru-hulls. Made from high-impact plastic, these adapters will not rust, corrode, or discolor.