2ltr Expansion Relief Kit including Check Valve

This is a speedflow accessory for an unvented water heater which is recommended for 5, 10 and 15 litre models depending on the details of the speedflow installation. Additional accessories may be needed to comply with the water regulations please check before purchase. This kit is required if there is a device present preventing reverse flow and if a one-way device is fitted that prevents hot water expansion, the pressure relief valve would operate routinely on the heating cycle. If there is a cold water off-take too close to the heater, it is a requirement that expanded hot water does not mix with drinking water supplies. If there is a cold water off-take very close to the heater there is a risk that the hot and cold-water supplies would mix.

• SF3 Kit Expansion vessel and check valve, 2 litre expansion set at 3.5 bar.
• Recommended if pressure is below 4.2 bar and hot water expansion cannot be accommodated in the pipework.
• Fast install inlet group new inlet group to connect expansion vessel and pressure relief valve, incorporating check valve and service valve, to ensure installation is correct every time. Allows for easier quicker installation, saves valuable time and service valve facilities easy maintenance.