This Zilmet branded Mini Expansion Vessel is an essential part for any boiler heating system. Its compact size and 1/2 BSP thread make it easy to instal and use. Designed to prevent water hammer and expand the boiler's capacity, this vessel is a must-have for any home or business that relies on a standard water heater. Whether you're a professional engineer or a DIY enthusiast, this Mini Expansion Vessel is a reliable and cost-effective solution for your heating needs. Its features include anti-water hammer and shock absorber, ensuring that your boiler runs smoothly and efficiently. Get your hands on this Zilmet Mini Expansion Vessel today and enjoy a warm and comfortable living space all year round.