Industrial pressure washer quick couplers, plugs, and O-rings are essential replacement parts for keeping commercial pressure washer systems connected, sealed, and working properly. Built for heavy-duty cleaning applications, these pressure washer fittings help create secure connections between hoses, spray guns, wands, lances, nozzles, pumps, and other pressure washer accessories. North Bay Equipment carries durable quick-connect couplers, pressure washer plugs, replacement O-rings, sockets, fittings, and connection parts for hot water and cold water pressure washers. Whether you need to replace a leaking coupler, repair a worn plug, stop water loss at a connection point, or keep extra O-rings on hand for routine maintenance, we can help you find the right parts for your equipment. These industrial pressure washer fittings are ideal for contractors, fleet maintenance shops, wash bays, manufacturing facilities, agriculture operations, wineries, food processing plants, equipment yards, and commercial cleaning teams that rely on dependable pressure washer performance every day.