This is the most consistent / well built regulator on the market! it stays on pressure even when your CO2 tank level goes down. UL listed. Approved for use by all major breweries. This model features WYE'd shutoff valves that are ball type check valves. These valves prevent product back-up into regulator. Easy twist body allowing you to quickly adjust your pressure! Regulator has "Shut down" safety sytem (blow off at 55 to 60 PSI.) Permanent Quad-Ring Seal on inlet nipple helps eliminate a source of leaks... no need to use a new fiber washer each time tank is changed. Heavy duty UL rated dual guages.