Grohe Adagio Concealed Dual Flush Cistern — 39053000
The Grohe Adagio 39053000 is a factory-complete concealed WC cistern engineered specifically for back-to-wall toilet pans, fitted bathroom furniture, and slim partition wall cavities. Operating with water-saving 6/3-litre dual flush EcoJoy® technology, it includes a flexible 0.5m Bowden cable actuation system paired with an authentic Grohe StarLight® polished chrome 50mm dual-flush push button for multi-directional mounting.
Identification & Technical Guide:
Brand: Grohe | MPN: 39053000 (39053) | Internal Reference: FTB13616 | Thread / Size: 1/2" BSP male thread (20.9mm OD) bottom inlet | Compatibility: Compatible with all standard BS EN 997 back-to-wall toilet pans and modular bathroom WC furniture
Key Features
- EcoJoy® 6L / 3L Dual Flush: Water-efficient dual flush configuration delivers high-velocity pan bowl clearance while reducing household water consumption.
- Bottom Entry 1/2" BSP Inlet: Standard UK 1/2" BSP male thread (~20.9mm OD) bottom water feed allows clean vertical pipework inside narrow vanity cabinets.
- 0.5m Flexible Cable Actuation: Smooth Bowden cable connection provides versatile installation of the push button on the front fascia, worktop, or furniture side panels (18–24mm wall thickness).
- Acoustic Noise Group I: Low-noise hydraulic float fill valve operates silently (tested to DIN 4109) down to a minimum 0.2 bar static pressure.
Installation & Compatibility Notes
Button & Aperture Sizing: Includes Grohe 50mm round dual-flush push button in StarLight® polished chrome. Requires a 50mm fascia hole cut-out and accommodates panel/fascia thicknesses between 18mm and 24mm.
Inlet Plumbing Advice: Bottom inlet connection standard is 1/2" BSP male parallel plastic thread (20.9mm OD). Hand-tighten the swivel female coupling with a rubber or fibre sealing washer, then tighten a quarter turn with a spanner. Do not apply liquid sealing paste or overtighten onto parallel plastic threads.
Compatible Replacement Spares
- Internal Flush Valve Assembly: Grohe Adagio dual-flush cable discharge valve with base cradle
- Internal Fill Valve / Ballvalve: Grohe 1/2" BSP quiet hydraulic bottom inlet float valve
- Dual-Flush Push Button: Grohe 50mm dual-flush round push button with 0.5m Bowden cable
- Pan Connection Seal: Standard 45mm external rubber flush cone washer