Passive disinfection filters

Logo Rewatec blanc, marque déposée.
Rewatec passive disinfection filter septic system
Disinfection filter septic systems seamless integration
Seamless integration

Blends into your property

Never damages landscaping

Treated effluent is odourless

Disinfection filter septic systems peace of mind performance
Peace of mind

24/7 autonomous operation

Never releases untreated wastewater

10-year warranty for filtering sand

Disinfection filter septic systems smart long term investment
Smart investment

Excellent performance-to-cost ratio

Pump uses minimal electricity

Low maintenance costs

What is a passive disinfection filter?

Rewatec passive disinfection filter septic system - Explosed view

Passive disinfection filters offer solutions for residential properties with impermeable soil, where treated wastewater cannot seep into the groundwater below.

Installed downstream from our sustainable Ecoflo compact biofilter, Rewatec passive disinfection filters (FDi) provide final treatment to wastewater before safely sending it into a watercourse or ditch.

Results meet the strictest effluent standards, protecting your property and the surrounding environment for years to come.

Our solution keeps money in your pocket by offering the lowest operating and maintenance costs of any disinfection filter on the market.


How do our passive disinfection filters work?

Ecoflo compact biofilter

Ecoflo green septic system - Polyethylene Pack model

The passive disinfection filter is installed downstream from our Ecoflo compact biofilter, the most sustainable septic solution in the industry.

Wastewater passes through the compact biofilter, percolating through an all-natural filtering medium that traps and removes pollutants. Treated wastewater is then sent to the passive disinfection filter for final purification.

Passive disinfection filter

Rewatec passive disinfection filter septic system

The layout of the passive disinfection filter is simple: it contains a horizontal sand filter that slopes slightly downward to a recirculation station.

A distribution system scatters wastewater across the uppermost portion of the sand filter. Wastewater then flows down the slope, slowly spreading across the entire surface of the sand.

This filtration process removes residual pollutants, ensuring that only disinfected wastewater reaches the recirculation station.

To guarantee that untreated wastewater never contaminates the property, the sand filter is installed on an impermeable membrane that separates the system from the site’s natural soil.

Recirculation and final dispersal

Recirculation station of the Rewatec passive disinfection filter

When wastewater reaches the lowest portion of the sand filter, it enters a polyethylene recirculation station.

The pump inside the recirculation station is silent during the day. It discreetly runs for less than seven minutes each night, pumping some wastewater back to the uppermost portion of the sand filter. This maintains stable moisture levels in the sand, which is important for system performance.

The remaining portion of wastewater is safely sent into a ditch or watercourse for final dispersal.

Passive disinfection filter maintenance

We have a network of local service partners, annually trained by us to maximize the life of your Ecoflo septic system and to protect your investment in your installation.

  • 15-point Ecoflo compact biofilter inspection
  • filter aeration to promote healthy bacterial activity
  • filter scarification to ensure optimal biofiltration
  • recirculation station inspection to verify pumping and discharge performance

10-year warranty

Our 10-year warranty for passive disinfection filters includes:

  • filtering sand
  • recirculation stations
  • original and replacement parts
  • labour
Rewatec 10 year warranty

Passive disinfection filter brochures and manuals


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Talk with an expert

Contact our expert in your area for more information about the Ecoflo biofilter and passive disinfection filter that is right for you.

Talk with an expert