Grohe 3/4" Carbodur Ceramic Headwork (Cold – 1/4 Turn) — 45887000
The Grohe 45887000 is an authentic, original-equipment 3/4" (DN 20) Carbodur ceramic disc tap headwork valve engineered specifically for the cold water side of Grohe high-flow two-handle bath fillers, deck-mounted bath combinations, and 3/4" concealed shut-off bodies. Operating with a 90° (1/4 turn) rotation that closes clockwise, it features diamond-hard carbon-coated Carbodur ceramic discs that resist mineral scoring, limescale adhesion, and friction wear. If your cold bath tap or shut-off valve is continuously dripping from the spout, passing water when shut, or feeling stiff to turn, this genuine OEM part restores effortless operation and a watertight seal.
Identification Guide:
MPN: 45887000 (also referenced as 45 887 000) | EAN / Barcode: 4005176132759 | Connection Size: 3/4" (DN 20) Thread | Operation: 90° (1/4 Turn) | Closing Direction: Clockwise (Right-Hand Close / Cold Side) | Technology: Carbodur Carbon-Coated Ceramic Discs | Spline: 15-tooth Grohe standard handle spline
Key Features
- Carbodur Carbon Coating: Diamond-hard coating on internal ceramic sliding discs ensures smooth operation and safeguards against scoring from hard water scale and pipeline grit.
- High-Flow 3/4" Capacity: Engineered for full-bore 3/4" bath taps, deck-mounted bath fillers, and wall stop valves requiring higher flow rates than standard 1/2" basin cartridges.
- Cold-Side Action: Calibrated for cold water control — rotates 90° anticlockwise to open, clockwise to close.
- Cures Spout Drips: Direct internal replacement to resolve dripping spouts, water bypass, and stiff or seized handle rotation.
- Genuine Grohe OEM Precision: Heavy DZR brass body machined to strict factory tolerances, supplied complete with pre-fitted base seal and thread O-ring.
Installation Note
Always isolate the mains cold water supply before servicing. Remove the handle cap/indice, undo the handle retaining screw, and lift off the handle and decorative shroud. Unscrew the old cartridge using a 19mm open-ended spanner or deep socket. Inspect the internal valve seating cavity for debris or limescale build-up and flush clean before installing the new 45887000 cartridge. Tighten securely to ensure the bottom seal compresses cleanly, avoiding excessive overtightening. (Note: For the matching hot side 3/4" cartridge with anticlockwise closing, the required part is 45888000).
Confirmed Model Compatibility
Designed for Grohe twin-handle 3/4" high-flow bath taps, 4-hole / 5-hole deck bath combinations, and 3/4" concealed wall shut-off valves, including:
- Grohe Concealed Stop Valves & Rough-In Bodies (3/4"): 29803000, 29804000, 29805000, 29806000 (3/4" Concealed Valves).
- Grohe Atrio (3/4"): Classic Atrio 3/4" two-handle bath fillers, deck-mounted 4-hole and 5-hole bath combinations (including 25011000, 25012000, 25013000 series).
- Grohe Costa & Costa L (3/4"): Costa 3/4" two-handle bath mixers, pillar bath taps, and high-flow wall valves (including 25406001, 25407001, 26732001).
- Grohe Sinfonia (3/4"): Sinfonia 3/4" bath mixers, 4-hole deck-mounted bath sets (25010000, 25032000 series).
- Grohe Geneva & Somerset (3/4"): Classic 3/4" high-flow bath filler collections specifying 3/4" Carbodur 90° cold headparts.
- Sizing Notice: This is a 3/4" (DN 20) headwork cartridge. It is noticeably larger than the standard 1/2" basin/bidet version (45882000). Always verify thread diameter before ordering.