Flamco Flexfast Expansion Vessel Service Valve - 3/4

Discover the efficient Flamco Flexfast expansion vessel service valve, designed as a robust isolating union for seamless maintenance of Flexcon expansion vessels in heating systems. Crafted from durable brass, this 3/4" valve enables quick checks of the vessel's gas charge or effortless replacement without the need to release system pressure or drain the installation, saving valuable time during servicing. Suitable for central heating applications with glycol-based anti-freeze up to 50%, it offers reliable performance across a wide temperature range and pressure conditions. With easy hand-screw assembly and precise connections, this high-quality service valve enhances system efficiency, reduces downtime, and ensures long-term durability for residential and commercial plumbing setups.