Part Number J1645T4XX ITEM NO. 5 having (CAGE Code 19857) and FSC 4820 Valves Nonpowered in stock with ready to ship. Get an instant quote for J1645T4XX ITEM NO. 5 Valve Safety Relief by Electric Heater Company 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.