Romast Grease Separator

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Romast grease traps/separators are designed for above ground fitment and installation into domestic kitchens or commercial premises producing wastewater containing fats oils and grease. The Romast are designed to fit under a sink, or can be free standing, and are easy to install. They require low maintenance and deliver long lasting performance making them an ideal choice to prevent damage to sewer pipes and wastewater treatment facilities.


Manufactured in accordance with EN 1825 Roto, grease separators are made from environmentally friendly material (polyethylene LLDPE). They are very durable, lightweight and resistant against various chemical substances used in kitchen.

Romast Size Range

Five models are available ranging from 250 ltr to 2000 Ltr: NG0.25, NG0.5, NG1, NG2 and NG4. All models have a large screw down sealed lid allowing easy access for cleaning.

What size of grease trap do I need?

The size of grease trap is determined by number of meals or the maximum possible flow of contaminated water, type of pollution, effluent temperature and detergent use. You can calculate by the formula: NG = Qs * fd * ft * fr * fm

  • Qs = The amount of wastewater in l/s
  • fd = Density of grease (if it is greater or lesser than 0.94 g/cm3)
  • ft = Temperature factor (if higher than 50 °C, is increased)
  • fr = Detergents factor
  • fm = Increased grease factor


Grease separators should be installed close to the source of contamination, inside or outside the building and should be easily accessible for cleaning and maintenance.


Manufactured in polyethylene, which is 100% recyclable and ribbed for reinforcement. Roto supply the Romast rotomoulded tanks in one-piece with large opening for ease of cleaning. The tanks have a 300mm diameter plastic cover with a seal making them watertight. The Roto tank wall thickness ranges from 8-14mm to give the tank its stiffness.


Roto Water Catalogue

UK Contact

Daniel Smithers
Phone: +44 (0) 7880 603010
Skype: danny.smithers1


Roto Group
Puconci 12, Puconci
9201 Puconci

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