Kettles and Burners

The Heart of the Brewery

The brew kettle is where wort is boiled, hops are added, and the foundation of flavor is built. Choosing the right kettle and heat source affects brew day efficiency, safety, and beer quality.

Kettle Material

Stainless steel — durable, easy to clean, non-reactive, and lasts a lifetime. More expensive but worth the investment. 304 stainless steel is the standard for brewing.

Aluminum — lighter, cheaper, and conducts heat more evenly than stainless. Requires seasoning (boiling water in the kettle before first use) to build an oxide layer that prevents metallic off-flavors. Professional breweries use aluminum; it is perfectly safe.

Kettle Size

Choose a kettle that holds at least 50% more than your batch size to prevent boil-overs:

5-gallon extract batches — 5-8 gallon kettle (partial boils on the stove)
5-gallon all-grain batches — 10-15 gallon kettle (full-volume boils)
10-gallon batches — 15-20 gallon kettle

Kettle Features

Ball valve — drains wort without lifting the heavy kettle. Essential for kettles above 8 gallons.

Thermometer port — a built-in thermometer or thermowell for monitoring temperature during mashing (if using the kettle as a BIAB mash vessel) and cooling.

Volume markings — etched gallon markings inside the kettle help track volumes during the boil.

Dip tube / pickup tube — a tube attached to the ball valve that reaches near the bottom, drawing wort from below the hop debris and trub layer.

Heat Sources

Kitchen stove — adequate for 3-4 gallon partial boils. Most residential stoves cannot boil 6+ gallons vigorously.

Propane burner — the workhorse for outdoor all-grain brewing. 50,000-200,000 BTU burners bring large volumes to a boil quickly. Bayou Classic SP10 and Blichmann Hellfire are popular options.

Electric elements — clean, precise, and usable indoors. Electric brew systems (Anvil Foundry, Grainfather, Clawhammer) integrate a kettle with a built-in heating element and temperature controller. They are ideal for apartment brewers and those who prefer indoor convenience.

Safety

Never use a propane burner indoors — carbon monoxide is lethal. Ensure a stable, level surface for the kettle and burner. Use heat-resistant gloves when handling hot equipment. Keep children and pets away from the brew area.