Name: RWM-DM¹ Oil/Grit Separator
Brand: Rainwater Management

Rainwater Management is proud to unveil our new ETV-verified Oil/Grit Separators (OGS), the RWM-DM¹ and RWM-DM¹-OS units. We have spent 18 months testing and developing the system to meet the latest ETV Canada Procedure for Testing Oil-Grit separators (ISO 14034) testing requirements.

The ETV Canada test protocol is the new standard that people refer to in Canada for OGS systems. We are the first to meet the new testing and reporting requirement. The latest requirement limits the inlet pipe size to ¼ the manhole diameter and limits the length to 3 times the pipe diameter.

Why This Matters

We tested OGS configurations mimicking competitor systems and found they would remove over 85% of the sediment captured in the upstream pipe. This means those OGS units trap pollutants in the upstream piping system rather than the OGS manhole. RWM targeted zero pipe settling so that we trap the sediment in the OGS manhole as it should be.

The RWM-DM¹-OS unit has a lower weir height than the RWM-DM¹ and specifically targets oil spill capture and retention while still removing sediment. The overall TSS removal does not change significantly with the OS units due to the fact that more rainfall occurs in the lower intensities.

Local Manufacturing

The concrete components of our OGS units are supplied by local pre-casters across British Columbia and in Alberta and Saskatchewan. Manitoba is serviced by Saskatchewan.

In Ontario we work with a well-established consulting firm, Echelon Environmental, who in turn work with local pre-casters.

Flexible Configuration

The system is available in both inline and offline options and can be used as a bend structure as it can handle multiple inlet pipes that can be as close as 45 degrees to the outlet depending on the pipe and manhole size.

RWM-DM¹

Local Manufacturing

Flexible Configuration

Key Benefits