The Double Poppet Emergency Shut-Off Valve has all of the same features as the PEMCO Model 911 Single Poppet Emergency Shut-Off Valve, except for the top. The top of the valve is designed with a secondary poppet to prevent spillage from the dispenser in the event the valve is sheared. The secondary poppet also features a pressure relief valve to relieve pressure build up due to thermal expansion. The Model 911DPC includes a machined bottom for easy compression fitting connection on the inlet for secondary containment piping and Model 911DPT includes a 2″ male threaded connection on the inlet for secondary containment. All models are UL Listed.