Mushroom Valve & Washer Pack

Pk 5

Mushroom Valves and Washers

Replacing the Mushroom Valve & Washer;

The Mushroom Valve is specifically designed to prevent water flowing out of the reservoir whilst filling. Should a replacement Mushroom Valve or Washer be required, please follow the steps below:

  • 1 Remove the reservoir from the Propulse®
  • 2 Remove the old Mushroom Valve from the reservoir and discard
  • 3 Insert a new Mushroom Valve into the reservoir
  • 4 Remove the rubber Washer from the underside of the tank plug hole and discard
  • 5 Insert a new rubber Washer into the lip on the underside of the tank plug hole
  • 6 Return the reservoir to the machine


  • When the mushroom valve is fitted correctly, it should lift slightly with the tension of your finger, when pressed.
  • Be careful when changing the valves and washers, as any damage to either will cause the tank to leak.
  • Be sure to check the valves and washers prior to each use, as they do wear through normal use and may need changing – this will help prevent possible damage to the water inlet valve.