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The RWC Aquasystem heating expansion vessel is red and features an internal membrane that prevents water from contacting the steel shell, preventing internal corrosion. Used to manage the expansion and contraction of water as it heats and cools, it is available in various options to suit all applications. Each version includes a replacement membrane, allowing servicing without removal. It comes equipped with a pre-charge valve for air pressure adjustments. Please note, brackets are not supplied. The vessel is designed for a 1.0 bar pressure and has a 5-litre capacity.. RWC Aquasystem Heating Expansion Vessel Red 1.0 Bar - 5l Reliance Water Controls (RWC) XVES100020