Expansion vessel 7 litres De Dietrich 721986700

An expansion vessel of 7 litres is an essential component in sealed heating systems, accommodating the expansion of water as it heats up. This prevents excessive pressure buildup that could damage the boiler or pipework. If your system pressure fluctuates or the relief valve frequently discharges, the expansion vessel may need replacement. A 7-litre vessel is suitable for many domestic heating systems, making it a common spare part for boiler maintenance and repair. Proper sizing and installation are key to system longevity.