This 2-litre expansion vessel and check valve kit is an essential addition for small unvented undersink or oversink water heaters, ensuring the longevity and safety of your system. Expertly designed to absorb excess water volume during heating, the expansion vessel prevents potential damage to your pipes and equipment.

Meanwhile, the check valve acts as a reliable one-way system, halting any backflow of hot water into the cold water mains. With a 3.5 bar pre-charge, this kit provides optimal protection for your cylinder against pressure surges, maintaining safe operational standards. Ideal for water heaters with a capacity between 6 to 15 litres, this kit guarantees seamless compatibility with unvented systems, offering peace of mind and enhanced performance for your heating solution.

• 2-litre expansion vessel ideal for small water heaters
• Prevents pressure build-up and protects piping
• Features 3.5 bar pre-charge for safety
• Check valve stops backflow into cold mains
• Suitable for 6L-15L unvented heaters
• Protects cylinder from pressure surges
• Compatible with undersink/oversink setups
• Ensures safe, efficient water heater operation