For residential and small commercial application

The revolutionary designed THERO system is the reverse osmosis solution for your residential and commercial water treatment. The THERO features an internal pump and is suited to applications including residential, water dispensers and small commercial machines.

  • Fresh, purified water at any time: 1.5 litres of water can be produced per minute through the dedicated stylish tap.
  • Intelligent & space-saving: Water is only produced when needed. An exclusive, elegant and very compact design enables a space-saving installation.
  • Low noise & low vibration: The aluminium construction enables low noise and vibration operation and prolongs the pump‘s service life thanks to optimum heat dissipation.
  • Easy to use: The membrane is a fully enclosed sanitary design. Allowing for simple replacement quickly and without the need for tools. An automatic “Aqua-Stop” in the filter head allows a filter exchange without having to turn off the water supply.
  • Simple use: App connection via Bluetooth for easy control and monitoring of water quality via smartphone or tablet (THERO 90PRO only).

The compact THERO system is typically supplied as multi-stage treatment process:

  1. Pre-filtration with a fibron carbon filter to remove sediment and chlorine
  2. THERO Reverse Osmosis system to reduce all dissolved solids including salt and hardness ions.
  3. Storage tank is optional depending on application
  4. Remineralisation to add minerals for full coffee flavour. (optional stage for coffee machine feed )


  • TDS rejection rate: 95% +
  • Performance: 90 lph 1.5 lpm
  • Temperature range: Cold water feed only
  • Electrical connection / fuse – 230V / 50Hz / 10A
  • Dimensions: (mm) W 121 / L 264 / H 450
  • Weight: 8.8 kg
BWT Professional App
for ROC systems

Training Videos

Thero PRO90 – Overview and app set-up

Product Models & Details

821117THERO 90PRO Reverse Osmosis System
TH90-DWSTHERO 90PRO Reverse Osmosis System - with Prefilter, Postfilter & Fittings Kit
TH90-COFTHERO 90PRO Reverse Osmosis System - with Prefilter, Postfilter, Fittings Kit & remin cartridge
TH90-COFTKTHERO 90PRO Reverse Osmosis System - with Prefilter, Postfilter, Fittings Kit, remin cartridge & 6 litre tank
812829THERO 90PRO Replacement RO membrane