15L / 30L Fermenter O-Ring Only (BM) is a replacement sealing ring designed specifically for BM 15L and 30L fermenters. It ensures an airtight seal between the fermenter lid and body, helping to maintain proper fermentation conditions and prevent leaks or contamination.

This product includes the O-ring only — fermenter and lid are not included.

Key Features

Compatibility: Suits BM 15L and 30L fermenters
Type: Replacement O-ring seal
Material: Durable, flexible food-grade rubber
Function: Creates an airtight seal to maintain pressure and prevent oxygen ingress
Installation: Simple push-fit replacement

Why Replace Your O-Ring?

Over time, fermenter seals can become worn, cracked, stretched, or flattened. Replacing the O-ring helps:

• Maintain a proper airtight seal

• Prevent CO₂ leaks during fermentation

• Reduce risk of contamination

• Restore optimal fermenter performance

Installation Tips

• Remove old O-ring and clean the groove thoroughly.

• Lightly sanitise the new O-ring before fitting.

• Ensure it sits evenly in the channel with no twists.

• Check for a secure seal before starting fermentation.

Ideal as a spare part or routine maintenance item for keeping your 15L or 30L BM fermenter operating reliably.