Part Number N18644 having (CAGE Code 25567) and FSC 4710 Pipe, Tube and Rigid Tubing in stock with ready to ship. Get an instant quote for N18644 Tube Assembly Metal by Gorman Rupp Co The. Fill the form below with your desired order quantity, targeted price and the expected order-fulfilment date. Our dedicated account manager will get back to you within 15 minutes.