Repairing a Dripping Hot Water Spout on the Breville Dual Boiler (BES920)

Hot Water Valve Seal Kit artwork showing the valve and two replacement O-rings.
Use the Hot Water Valve Seal Kit for this needle-valve repair.

Hot-water valve • Breville Dual Boiler BES920

Repair a hot-water spout that drips when the valve is closed.

This guide shows how to reach the needle valve, replace its two O-rings, and reassemble the valve in its original order.

Buy the Hot Water Valve Seal Kit

At a glance

Breville Dual Boiler BES920. About 45 minutes.

This repair addresses

  • A hot-water spout that drips when closed
  • Water leaking through a closed hot-water valve
  • Worn or flattened O-rings in the needle valve

Before you start

  • Unplug the machine and let it cool fully before removing the cover.
  • Keep the machine unplugged until the top cover, controls and every removed screw are refitted. Close the machine before any powered test.
  • DIY repairs carry risk. Stop if you are unsure about opening or reassembling the machine.

Tools and supplies

  • Phillips screwdriver
  • T20 Torx driver
  • Small pliers for hose clips
  • 14 mm spanner
  • Adjustable spanner
  • Flat-blade screwdriver
  • Large pliers or a suitable socket for the retaining nut
  • Food-grade grease for the new O-rings
  • Rubber glove for grip on the knob (optional)

Select any photo to see it at full size.

1. Open the machine

Remove the outer screws and lift the lid to reach the hot-water valve.

  1. Unplug and cool

    Unplug the machine and let it cool fully before starting.

  2. Remove the front screws

    Remove the two Phillips screws underneath the front panel.
    Two marked Phillips screw positions under the front panel of a Breville Dual Boiler.

  3. Remove the rear screws

    Remove the two T20 Torx screws at the back of the machine.
    Two marked Torx screw positions at the rear of a Breville Dual Boiler.

  4. Lift the lid

    Carefully lift the lid to expose the control panel and hot-water valve area.

2. Free the hot-water valve

Remove the knob and control parts before disconnecting the valve assembly.

  1. Pull off the knob

    Grip the hot-water knob and pull it straight off; use a rubber glove if you need more grip.
    Hand pulling the hot-water knob straight off its shaft.

  2. Remove the inner screw

    Remove the Phillips screw inside the knob shaft.
    Screwdriver at the inner screw inside the hot-water knob shaft.

  3. Undo the microswitch screws

    Undo the two screws holding the microswitch.
    Hot-water control panel with the two microswitch screws marked.

  4. Release the remaining knob core

    Use a flat-blade screwdriver to release the remaining part of the knob.
    Flat-blade screwdriver releasing the remaining hot-water knob core.

  5. Remove the valve-bracket screws

    Remove the two screws holding the hot-water valve bracket.
    Front valve opening with two bracket screw positions numbered.

  6. Release the hose clips

    Use pliers to remove the two hose clips from the valve.
    Hot-water valve with the two hose clips numbered.

  7. Withdraw the valve

    Remove the final two screws, then withdraw the valve assembly for bench work.
    Hot-water valve with its two final retaining screws numbered.

3. Replace the needle-valve O-rings

Keep the removed valve parts in order so they can go back together the same way.

  1. Release the nut and retaining clip

    Use large pliers or a suitable socket to remove the retaining nut.

    Remove the small retaining clip from the valve shaft and keep it with the valve parts for reassembly.
    Hands holding a small C-shaped retaining clip beside the hot-water valve shaft.

  2. Keep the parts in order

    Lay out the valve parts in their removal order before continuing.
    Disassembled hot-water valve parts laid out on a blue work surface.

  3. Hold the valve body

    Secure the valve body with an adjustable spanner.
    Adjustable spanner securing the hot-water valve body for needle removal.

  4. Unscrew the needle

    Unscrew and withdraw the internal needle to expose its two O-rings.
    Removed needle showing two dark O-rings near its tip.

  5. Fit the new O-rings

    Cut off the worn O-rings, install the two replacements from the kit, and apply a little food-grade grease.

4. Reassemble and test

Return the valve and control parts to their original positions.

  1. Reassemble the valve

    Reassemble the needle valve in the same part order you recorded during disassembly.

  2. Reinstall the valve and controls

    Return the valve to its bracket and refit its screws, hoses and clips. Reinstall the knob core, microswitch, inner screw and knob in the reverse order of removal.

  3. Close the machine before testing

    Refit the top cover and all front and rear screws before reconnecting power. Run a normal hot-water check with the machine closed and check for continued dripping or external leaks. If it leaks, switch off, unplug and let it cool before further inspection.

If the spout still drips

This procedure addresses the two needle-valve O-rings. If dripping continues after reassembly, the valve needs further diagnosis before other parts are replaced.

Final check

  • The valve parts are back in their original order and the valve is reinstalled.
  • The hose connections, clips, bracket screws, knob, and cover parts removed for access are refitted.
  • The top cover and all front and rear screws are installed before power is restored.
  • The hot-water spout has been tested for leaks after reassembly.

DIY repairs carry risk. If anything is uncertain, stop and consult a qualified technician. Read our full disclaimer.