Part Number 800M4-QT .500 IN having (CAGE Code 79227) and FSC 4820 Valves Nonpowered in stock with ready to ship. Get an instant quote for 800M4-QT .500 IN Valve Vacuum Breaking by Watts Regulator Co. 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.