Special Offers Kit B 3.5 Bar Pressure Reducing Valve 406802

This is Kit B, a pressure reducing valve supplied by Special Offers and factory set to 3.5 bar. It forms part of the pressure control arrangement on Ariston water heaters, where it regulates incoming supply pressure before it reaches the appliance. The valve is supplied as a kit, so the parts needed for the pressure reducing stage are grouped together for a single job.

• System pressure reads noticeably above the 3.5 bar setting, or keeps climbing regardless of adjustment
• Water weeping from the valve body, adjustment cap or connections
• The pressure relief valve downstream discharges repeatedly
• Outlet pressure is erratic, pulsing or drops away under draw-off
• The valve no longer holds a steady downstream reading after setting

• Confirm the existing valve is the 3.5 bar version and matches Kit B, as pressure reducing valves are supplied in different preset ratings
• Check the appliance is an Ariston water heater so the kit matches the unit on site
• Verify the inlet and outlet connections on the existing valve against the kit before dismantling
• Isolate and depressurise the supply before removing the old valve