By Lauren HollandUpdated November 2026
Turning a corny keg into a working fermenter is one of the most popular budget upgrades in home brewing, and the right parts make the difference between a clean conversion and a leaky mess. The three products below were chosen by checking listing details, brand reputation and common owner feedback patterns for fittings that handle the convert keg to fermenter job. We have not tested these parts ourselves; the comparison is based on what manufacturers specify and what owners tend to report.
Our top picks at a glance
- 1
TOP CHOICEBest overall5" Tri Clamp Ball Lock homebrew beer conry keg fittingView on Amazon - 2
Best for tri clamp to ball lock adaptersDERNORD 1.5 Inch Tri Clamp to Ball Lock Post, SS304 Sanitary Brewer FittingView on Amazon - 3
Best for liquid transfersFerroday 304SS Floating Dip Tube for Corny KegView on Amazon
Our Top Picks
Quick Comparison
| Product | Best for | Key feature |
|---|---|---|
| 1.5″ Tri Clamp Ball Lock fitting | Pressure and gas connections | SS304 sanitary fitting |
| DERNORD Tri Clamp to Ball Lock Post | Tri clamp conical adapters | 1.5 inch tri clamp design |
| Ferroday Floating Dip Tube | Clear liquid transfers | Floating ball with silicone tube |
1.5″ Tri Clamp Ball Lock homebrew beer conry keg fitting
1.5" Tri Clamp Ball Lock homebrew beer conry keg Ball Lock Post SS304 Sanitary Brewer Fitting 50.5mm OD ferrule SS conical fermenter pressure transfer (gas)19/32
Best for: Pressure and gas connections on a converted keg.
This fitting suits homebrewers who want a stainless ball lock connection that works with a tri clamp setup for pressure transfers. Manufacturers describe it as SS304 sanitary brewer fitting with a 50.5mm OD ferrule.
Pros
- SS304 stainless construction
- Works with standard tri clamp ferrules
Cons
- Requires a matching clamp and gasket
DERNORD 1.5 Inch Tri Clamp to Ball Lock Post, SS304 Sanitary Brewer Fitting
DERNORD 1.5 Inch Tri Clamp to Ball Lock Post, SS304 Sanitary Brewer Fitting, 50.5mm OD Ferrule for Conicial Fermenter Pressure Transfer (Liquid)
Best for: Tri clamp to ball lock adapters on conical fermenters.
This post is aimed at brewers who already own a conical or tri clamp vessel and want to connect it to a corny keg. Owners often report it fits the 50.5mm ferrule size listed in the specs.
Pros
- Direct tri clamp to ball lock connection
- Stainless SS304 build
Cons
- Fit depends on matching the 1.5 inch clamp size
Ferroday 304SS Floating Dip Tube for Corny Keg
Stainless Steel Ball Floating Kit with 31" Silicone Tube, Fermenter Floating Dip Tube for Corny Beer Keg, HomeBrew Supplie Ferroday 304SS Floating Dip Tube for Corny Keg, Ball Lock Float Dip Tube
Best for: Clear liquid transfers out of a keg.
This floating dip tube keeps the pickup point near the liquid surface, which helps reduce trub and sediment during transfers. It is designed for corny kegs with a ball lock post.
Pros
- 31 inch silicone tube included
- Floating design pulls from the top layer
Cons
- Silicone tube can kink if routed tightly
Buying Guide
Fitting Type
Check whether your vessel uses a tri clamp or a ball lock post before buying. Mismatched fittings are the most common reason a conversion fails to seal.
Material Grade
Look for SS304 stainless steel, which manufacturers commonly specify for sanitary brewing fittings. Avoid plated or unlabeled metal near beer.
Dip Tube Length
Measure the inside height of your keg before ordering. A tube that is too short will not reach liquid, and one that is too long may bind.
Gasket and Clamp Compatibility
Confirm the ferrule size and gasket type match your clamp. A 1.5 inch clamp is the size most often listed for these conversions.
Good picks for this: 1.5″ Tri Clamp Ball Lock fitting and DERNORD Tri Clamp to Ball Lock Post
FAQ
Can I convert any keg into a fermenter?
Most homebrewers use corny kegs with ball lock or pin lock posts. Check the keg type and fitting size before buying parts.
Do I need a dip tube for a keg fermenter?
A dip tube helps you transfer beer without disturbing sediment. A floating dip tube is useful when you want to pull from the top layer.
Should I consult a professional about pressure fermenting?
Pressure vessels carry real risk if rated incorrectly. Consult a qualified professional or follow your equipment manufacturer’s pressure limits.
Conclusion
For a basic convert keg to fermenter build, start with the 1.5″ Tri Clamp Ball Lock fitting for gas and pressure connections. Add the DERNORD post if you are connecting a tri clamp vessel, and the Ferroday floating dip tube if you want cleaner liquid transfers.
Sources
- Food safety guidance on stainless steel and food-contact materials (fda.gov)
- Pressure vessel and compressed gas safety standards (osha.gov)
- Standards for pressure vessel design and construction
Related reading
- How to Transfer from Fermenter to Keg: A Step-by-Step Guide for Homebrewers
- Why Is My Fermenter Too Exposed in Valheim? Causes and Fixes
- White Film on Beer in Fermenter: What It Is and How to Fix It
- When to Transfer to Secondary Fermenter: A Homebrewer's Guide
- When to Transfer to Secondary Fermenter Beer: A Homebrewer's Guide
- When to Dump Yeast from Conical Fermenter: A Step-by-Step Guide
About Lauren Holland
Lauren Holland is part of our editorial team and reviews and edits our home brewing guides, checking product details against manufacturer specifications and owner feedback.
