Grohe Arena Cosmopolitan S Dual Flush Plate — 38858000
The Grohe Arena Cosmopolitan S 38858000 is an authentic, compact wall-actuation plate designed for modern concealed cisterns and wall-hung toilet frames. Featuring an elegant lozenge/oval dual-button profile on a slim rectangular faceplate, this "Size S" version is smaller and sleeker than standard Grohe plates. Coated with scratch-resistant Grohe StarLight mirror chrome, it provides dual-flush and start/stop operation via an integrated magnetic fixing bracket and pneumatic connection to Grohe AV1 drop valves.
Identification & Technical Guide:
MPN: 38858000 | EAN: 4005176326165 | Range: Arena Cosmopolitan S (Small Size) | Dimensions: 130 mm (W) × 172 mm (H) × 5 mm (D) | Material: High-Grade ABS | Colour Code: 000 (StarLight Chrome)
Key Features
- Compact "Size S" Profile: Measures just 130 × 172 mm with a super-slim 5 mm projection from finished tiles.
- Dual Flush & Start/Stop: Accommodates full flush (6L/9L), eco flush (3L/4.5L), or manual start/stop flush control to cut water waste.
- Grohe StarLight Chrome: Flawless, mirror-shine finish engineered to withstand corrosion, tarnishing, and regular chemical bathroom cleaning.
- Universal Mounting: Can be installed vertically or horizontally to suit wall design and frame orientation.
- Magnetic Holding System: Features a tool-free magnetic mounting bracket for neat, flush alignment and easy maintenance access.
Critical Fitment & Inspection Shaft Requirements
Crucial Fitment Note: This is a Size S (Small) plate (130 × 172 mm) and will NOT fit directly onto standard Grohe large inspection shafts (156 × 197 mm cut-outs).
Cistern Compatibility:
• Rapid SLX: Directly compatible out of the box (comes factory fitted with the small inspection shaft).
• Rapid SL / Uniset (GD 2 Cistern): Requires the Grohe 40 911 000 small inspection shaft retrofit adapter (sold separately) to install.
• Grohe Slim / 80mm Cistern (38 862): Requires retrofit shaft 40 949 000.