Baxi Pressure Reducing Cartridge 3 Bar 95605891

The Baxi pressure reducing cartridge, part number 95605891, is a 3 bar regulating cartridge used in Baxi Assure and related Baxi appliances. It sits inside the pressure reducing valve body and holds the incoming cold mains supply at a steady 3 bar, protecting downstream components such as the diverter assembly, plate heat exchanger and expansion vessel from excessive or fluctuating mains pressure. It is a cartridge-type component that fits into the existing valve housing rather than a complete valve assembly.

• System pressure creeping above the normal cold fill reading, or rising steadily with no top-up from the filling loop
• Water discharging from the pressure relief valve discharge pipe, particularly when the appliance is heating up
• Pressure gauge reading unstable or fluctuating at the appliance during draw-off
• Scale, debris or a worn seat inside the cartridge causing poor regulation
• Repeated pressure loss or over-pressurisation faults traced back to the reducing valve

• Confirm the appliance model and serial number against the compatibility list before ordering, as the same cartridge is used across several Baxi ranges
• Match the part number on the existing cartridge to 95605891, and check the alternative number 1735381 where the original marking differs
• Inspect the valve body and any seal or washer at the cartridge seat, and replace if damaged or perished
• Work on the appliance only with the water and power isolated, and follow the manufacturer's instructions for depressurising the system