How to install the O-ring on the FerMonster™ PET Fermentor.

FerMonster™ PET Fermentor


With a wider 4” mouth, there is easier access for cleaning. It is made of heavy P.E.T. plastic.
  • Our Carboys do not use any plasticizer and are made with 100% Virgin material. Made with Food grade materials and BPA free.
  • Comes with an O-ring and air-tight ONE PIECE lid with a hole that will take our #10 stopper. The lid hole is 4.3 cms (1.7”) in diameter.
  • There are no ribs, only smooth sides, so no yeast or sediment will adhere to walls during fermentation.
  • Solid lid is available as an option (not included in the product sold as a separate item) so you can customize your lid (drill as many holes as you wish).
  • Completely taste and odour-free. It is also stain resistant.
  • Impermeable to oxygen.
  • 100% made in Canada.
  • Comes with 5-Gallon, 6-Gallon and 7-Gallon easy-to-read markings on the side.
  • Also they are big enough so you can use them as your Primary Fermentor.

The FerMonster™ PET Fermentor is hard to carry, we strongly suggest that you purchase our carboy carrier (make sure it fits your specific size of carboy).


Two versions available:
  • FerMonster™ 6 Gallon PET Fermentor: Diameter 280 mm (11”), height 490 mm (19.2”) (including lid)
    *When completely full the 6 gallon can accommodate up to 24 litres (6.3 US gallon)
  • FerMonster™ XL 7 Gallon PET Fermentor: Diameter 287 mm ( 11.3”), height 530 mm (20.9”) (including lid)
    *When completely full the 7 gallon can accommodate up to 28.5 litres (7.5 US gallon)

Note: we do not sell our products directly.

If your local retailer does not carry our products, feel free to e-mail us so we can direct you to the nearest retailer.
If you are a retailer, please let your preferred wholesaler know about your needs.