Brewing safely on a gas burner on your balcony

Check the gas setup first

Most balcony brewers use a high pressure outdoor burner or a heavy duty single burner connected to an LPG cylinder. Whatever you use, the gas side matters most.

• Hose: use an ISI marked LPG hose of the right type for your regulator, with no cracks, stiffness or kinks. Replace it as the supplier recommends. Replace it immediately if it looks worn.
• Regulator: use the correct regulator for the burner. High pressure burners need a matching high pressure regulator. Never improvise.
• Clips: secure the hose at both ends with proper clips.
• Cylinder: keep it upright, on a stable surface, at least a metre from the burner and never under it. Keep it out of direct sun.

Before every brew, test the joints for leaks with soapy water. Brush it on the connections and turn the gas on. Bubbles mean a leak. Never use a match or lighter to test for leaks. If you smell gas, turn off the cylinder valve, do not switch on anything electric and ventilate the area.

Boil overs and a flame that goes out

This is the risk people underestimate. Wort foams up just as it reaches the boil (the hot break) and can surge over the rim in seconds. On a gas burner, that foam can put the flame out while the gas keeps flowing.

Many simple outdoor burners have no flame failure device to cut the gas when the flame goes out. Unburnt LPG is heavier than air and pools at floor level, especially on an enclosed balcony. Stay beside the burner as the wort approaches the boil. Turn the flame down at the first sign of foam. Keep a spray bottle of water handy to knock the foam back. Leave plenty of headspace in the pot. Our guide to what happens during the boil explains the hot break.

Stability, wind and space

• A stable stand. A full 30 litre pot weighs over 25 kg. Use a low, wide, sturdy burner stand on a flat floor, never a plastic table or a stool.
• Wind. Balcony wind can blow the flame sideways, heat the cylinder or the hose, or blow it out. A metal windshield around the burner helps, but leave space for air to reach the flame.
• Clear space. Keep plants, clothes lines, curtains, plastic chairs and anything flammable well away. Move dried laundry before you light.
• Ventilation. An open balcony is fine. A balcony enclosed with glass or grilles and sheets needs open windows or doors so combustion gases can escape.

Hot liquid is the most common injury

Burns from hot wort are far more common in homebrewing than gas accidents. Twenty litres of wort near 100 °C is heavy, slippery and dangerous.

• Never carry a full pot of hot wort through the house. Cool it where it is, with an immersion chiller, or drain it through a tap into the fermenter.
• Wear closed shoes and long trousers. Use heat resistant gloves.
• Keep children and pets indoors and the balcony door closed while you brew.
• Lift a wet grain bag with a pulley or have a friend help. A hot, dripping bag can weigh more than 10 kg.

Keep a fire extinguisher suitable for gas and general fires, such as a dry powder ABC type, within reach. Know how to use it before you need it.

Neighbours and society rules

Many housing societies have rules about open flames and gas cylinders on balconies. Check yours before you set up. Strong boiling wort smells sweet and grainy, which most people like, but hops and spent grain are less popular in a neighbour's living room. Brewing on a quiet morning and cleaning up promptly keeps things friendly. Our guide to brewing in a small Indian apartment has more on fitting brewing into flat life.

A simple pre-brew routine

Check the hose and clips. Do a soapy water leak test. Clear the space. Set the stand and windshield. Fill the pot with enough headspace. Keep the extinguisher, gloves and spray bottle in reach. Never leave a lit burner unattended. Turn off the cylinder valve, not just the burner knob, when you finish.

Safety is a habit you build, the same way commercial brewers build it into every shift. Our guide to first homebrew mistakes covers the other things that commonly go wrong.