Flame King Multi Valve for 100lb Propane CylinderThe Flame King Multi Valve for 100LB Tanks is a must have if you don't want your tank to be transported every time you need it refilled! This allows you to do on site refilling of your propane gas without disconnecting your appliances. It includes a service valve, a high capacity filler valve with integral back check, a pressure relief valve (375 PSIG), and a POL valve. Compatible with the Flame King 100LB tanks YSN100MLT 1 and YSN100. SAFE and SECURE