Baxi Expansion Relief Cartridge 8 Bar 95605888

The Heatrae Sadia 8 bar expansion relief cartridge is a pressure relief valve insert used on unvented hot water cylinders and stored water appliances. It opens at its set pressure and discharges excess water through the relief pipework, keeping cylinder pressure within safe limits. This cartridge is supplied as a spare for Baxi and Heatrae Sadia cylinder ranges and sits within the water controls group of components.

• Water continually weeping or discharging from the relief outlet or tundish when the cylinder is at normal operating pressure.
• System pressure rising above the usual working level and staying high after the cylinder has heated.
• The relief valve failing to reseat after it has lifted, leaving a steady drip from the discharge pipe.
• Scale, grit or debris trapped on the valve seat, causing the cartridge to pass water even when pressure is normal.
• Visible damage, corrosion or a perished seal on the cartridge body when the valve is stripped down.

• Confirm the appliance model and serial number against the compatibility list, as the same cylinder family can use different relief cartridges.
• Check the existing valve marking to confirm the 8 bar rating matches the appliance requirement.
• Note the alternative part number 1735963 so the correct item can be identified if the original number has been re-labelled.
• Inspect the valve housing and any sealing washers while the cartridge is removed, and replace them if they show signs of wear.