The Assurance Valve "Eliminator" 4-Cylinder Automatic CO2 Changeover is the industry's most reliable failsafe for continuous gas supply. Engineered with a patented non-electric design, this system automatically switches from a primary "bank" of two cylinders to a reserve bank as soon as the pressure drops to approximately 185 PSI. This ensures that your draught beer, soda fountains, or CO2-enriched environments never experience a service interruption, even during peak hours when a tank might run dry.

Constructed from high-grade brass and stainless steel components, the Eliminator is built for longevity and is backed by an incredible 20-year manufacturer warranty. Because it is entirely mechanical, there are no solenoids to fail and no electrical connections required—making it immune to power outages. The system comes complete with four 4-foot high-pressure hoses (CGA-320), allowing you to manifold four large CO2 cylinders together for a massive gas reserve that minimizes the frequency of tank swaps.