Geberit Sigma 8cm Concealed Cistern 109.792.00.1
 is a Sigma 8cm (80mm) slimline concealed dual flush cistern (UP720) designed for use with floor-standing back-to-wall WCs. It is installed within a wall cavity for a minimalist bathroom aesthetic. 
Key Specifications:
 
Dimensions: 410mm (width) x 820mm (height) x 80mm (depth). The slimline depth makes it suitable for small spaces.
Flush Volume: It offers a dual flush system with a factory setting of 5.8 litres for a large flush and 3 litres for a small flush. The small flush volume can be adjusted within a range of 2–4 litres.
Actuation: The cistern is designed for front actuation only and requires a compatible Geberit Sigma flush plate, which is sold separately.
Water Supply: The water supply connection is located at the top left and features an integrated angle stop valve.
Material: The cistern is made of plastic and is fully insulated against condensation.
Installation: It is designed for concealed installation in part- or room-height prewall installations or masonry walls and includes necessary fittings and fastening material. Tool-free installation and maintenance access is a key feature.
Geberit Sigma 8cm Concealed Cistern 109.792.00.1