Grohe 46678000 1/​2" Red Duo Kitchen Quarter Turn Flow On/​Off Compatible Cartridge for Hot (Clockwise Close)

Summary

Grohe 46678000 1/2" Red Duo Kitchen Quarter Turn Flow On/Off Compatible Cartridge for Hot (Clockwise Close)

Measurements:

The 46678000 cartridge is used in the following Grohe models:

• Grohe Red Duo kitchen mixer and single boiler (3 litres)

Grohe 46678000 Red Flow Cartridge

The Grohe 46678000 is a 1/2 inch quarter-turn on/off ceramic disc flow cartridge designed for use in compatible Grohe kitchen mixer taps. It controls the hot water flow path and ensures reliable shut-off and smooth handle operation when fitted correctly.

Function

This flow cartridge regulates hot water supply within the tap body. When the handle is turned it opens or closes the hot water circuit, providing stable flow and shut-off. The cartridge uses a 20-spline mechanism and closes clockwise.

Confirmed Compatible Grohe Models

• Grohe Red Duo single lever 1/2" kitchen boiling water mixer 30058000
• Grohe Red Mono pillar tap and single-boiler kitchen mixer (various Red series models specifying 46678000 as the flow cartridge)

Other Grohe kitchen mixers from the Red (boiling water) range or similar models may be compatible where their specification lists cartridge 46678000. Always confirm compatibility by checking your existing cartridge code or the tap’s spare-parts documentation before ordering.

Selection and Verification

Before ordering, verify that your tap is from the Grohe Red-series boiling water or single-boiler range and that the hot cartridge is labelled 46678000. Because Grohe uses multiple cartridge types across different mixer families, matching the cartridge code and spline configuration is essential for correct fit and leak-free operation.

When Replacement Is Recommended

Replace the 46678000 cartridge if the tap leaks when closed, hot water does not shut off properly, flow becomes weak or erratic, or the handle rotates stiffly or poorly. Installing a properly matched flow cartridge can restore smooth operation and reliable hot water control without replacing the whole tap unit.