A HDPE fermenter is a fermentation vessel made from High-Density Polyethylene (HDPE), a food-grade plastic that is strong, lightweight, and resistant to chemicals.

In brewing, winemaking, and distilling, HDPE fermenters are widely used because:

• Food-safe & inert → Won’t leach harmful chemicals into your brew.

• Durable → Resistant to cracking and impact, even when full.

• Lightweight → Much easier to handle than glass carboys.

• Opaque or semi-opaque → Helps block UV light, which can spoil beer or wine.

• Easy to clean → Smooth surfaces resist staining and odors if cleaned promptly.

• Cost-effective → Cheaper than stainless steel fermenters.

They usually come in sizes from 5L up to 60L+, often with a screw-top lid, tap, and airlock bung.

For home brewing, HDPE fermenters are popular because they’re affordable and practical. For advanced setups, stainless steel fermenters are preferred for longevity and better sanitation.