Pump liquids safely and effectively with suction and discharge hose couplings. You'll find all the suction and discharge couplings you need to pump water from basements, cisterns, vats or any hazardous area. Locate couplers from one inch to six inches in lengths, plus shop a range of thread sizes and styles to find the perfect fit for your discharge hose. Our line of couplers come in durable materials like brass, aluminum, stainless steel and nylon. You'll also find an assortment of coupler accessories here including finger rings, safety locks and stainless steel pins.