The AQ2 Expansion Vessel & Check Valve is an essential component for your storage tank water heater system. Designed for reliability and compatibility with a range of setups, this vessel ensures that your water supply remains consistent and compliant with regulations.Crafted with meticulous attention to detail, the expansion vessel is linked to a check valve which ensures a safe and efficient operation of your plumbing. It is a practical solution for maintaining the integrity of your water heating system, enhancing its performance and longevity.