Stormwater Treatment

EcoTreat Gross Pollutant Trap

The EcoTreat Gross Pollutant Trap (GPT) are the most economical solution for the removal of floating debris and silt from stormwater run-off or washdown water. This GPT, which replaces conventional stormwater catchment pits, protects the environment from gross pollutants such as plastic bags, cans and other trash, plus bark chips, sand and fine silt, by at-source treatment of run-off.

Features of the EcoTreat GPT include:

  • versatile compared to alternative options
  • non-corrosive, impact resistant polyethylene basket 
  • stainless steel lifting handles
  • galvanised grate suitable for pedestrian or light vehicle traffic supplied as standard. A heavy-duty grate is available as an option



The DrainAce Compact is commonly found in restaurants, basements of high-rise buildings, boardrooms, laboratories, doctor or dental surgeries, construction sites and portable buildings. Units are also available for greasy waste discharge from grease arrestors. 


The EcoTreat GPT is commonly found in the following applications: 

  • carparks and driveways
  • loading docks
  • industrial rubbish bin bays
  • commercial developments
  • washdown bays
  • stormwater treatment device pre-treatment
  • pump pit inlet sumps
  • outdoor eating areas




The EcoTreat Gross Pollutant Trap is constructed from glass-reinforced concrete. The device is fitted with a non-corrosive, impact resistant polyethylene basket with significant silt handling capacity, yet lightweight enough to enable emptying by hand.  

If the intensity of rainfall exceeds the flow capacity of the silt basket, or if bad housekeeping has allowed the basket to become full or blocked, water will back-up into the catchment area, forcing maintenance. For applications where this could result in flooding of buildings or adjoining properties, the model GPT-B with a bypass overflow should be used.


Pit construction 

6 mm glass reinforced concrete

Pit sizes 

Model 66

Model 69 


6002 x 600 mm deep 

6002 x 900 mm deep 

Recommended outlet size 

80-150 mm 

Treatment flow rate 

10 L/s 

Bypass flow rate 

20 L/s 

Galvanised grate 

Light or heavy service 

Silt capacity 


Main chamber


30 L 

70 L

The GPT can be used to protect pumping chambers and down-stream stormwater detention tanks or treatment devices. Multiple units can be installed to ensure effective site coverage and maximise first flush catchment.  

Based on Global Water’s proven glass reinforced concrete (GRC) 600 x 600 mm sumps, the EcoTreat GPT offers optimum versatility, with the outlet able to be installed on-site at any invert to suit site requirements.  

A galvanised grate suitable for pedestrian or light vehicle traffic is supplied as standard. A heavy-duty grate is available as an option.

Enquire here for more information or to request a quote: