By Geberit.

The Monolith Floor Mounted Toilet Tank 131.145.S creates a modern design by allowing the toilet to be mounted to the floor of the bathroom. The glass front frame which affixes to the wall will give your bathroom a luxurious look. Use with floor-mounted toilets.


  • System for replacing a floor mounted toilet
  • Dual-flush tank system in front of the wall
  • Dual-flush system allows 1.6/0.8 GPF (6/3 LPF), giving effective flush volume of 1.1 GPF (4 LPF)
  • Anti-siphon fill valve
  • Impact resistant ASA tank, insulated to prevent condensation
  • For toilet seated heights of 17-3/4"
  • Tank and frame, water supply hose, and toilet outlet
  • Fits new or existing rough-in dimensions from 9" to 12"
  • Complies with the following standards/codes:
      • ASME: A112.6.2, A112.19.5, A112.19.14
      • ANSI Z124.4
      • CSA B125.3
      • ANSI/ASSE 1002
      • IAPMO PS-50
      • ASME A112.19.2
      • This concealed tank is WaterSense® compliant
  • 17.312" W X 4.75" D X 42.5" H
  • Product Weight: 64.8 lbs.
Metal, plastic, Glass
Manufacturer Information
Click to download specifications.

Toilet Bowl and Seat not included.

View Manufacturer Warranty.

Item Number