Various materials are used to manufacture grease trap bodies. The material chosen for the grease trap will affect its durability and design life.
The most common materials used for the manufacture of grease traps are described below.
Rotational moulded polyethylene
EcoJet and Lipumax-P grease traps are manufactured from rotational moulded polyethylene. Polyethylene is a lightweight, flexible and robust material that facilitates handling and installation.
Polyethylene is durable and has excellent chemical and corrosion resistance properties. Polyethylene does not require re-lining and is suitable for installations in acidic and alkaline soils.
Polyethylene is significantly more impervious than other materials, ensuring no leaching of wastewater which is a requirement when installed in sensitive environments.
Precast concrete grease traps have thick walls to provide structural integrity. They are heavy, cumbersome and difficult to transport requiring higher installation costs as cranes and specialist equipment are needed to excavate and install the grease trap.
Cement concrete is a porous material and can absorb water up to 3% by weight. Concrete grease traps require regular maintenance and re-lining to prevent groundwater contamination.
In corrosive environments concrete is prone to deterioration, particularly in alkaline soils. The concrete surface is rough making it hard to clean and the air pockets provide cavities for vegetation growth.
Glass reinforced plastic
Lipumax-G grease traps are manufactured from glass reinforced plastic. The material is a strong yet lightweight for easy installation. The smooth surface is easy to clean and corrosion resistant.
Glass reinforced concrete
Glass reinforced concrete is a mixture of cement, fine aggregate, chemical admixtures, glass fibres and water. The material is lightweight but is brittle, prone to cracking and porous.
Glass reinforced concrete grease traps require regular maintenance and re-lining to prevent groundwater contamination. In aggressive environments the material is prone to deterioration, particularly in alkaline soils.