Can You Use a Copper Still for Distilled Water?

Can you use a copper still for distilled water? Absolutely. A copper alembic still is one of the most effective and elegant ways to produce pure distilled water at home. In this guide, we explain the process in detail, cover the benefits of distilled water, and show you how to get the best results from your copper still.

The Short Answer

Yes, a copper alembic still works exceptionally well for producing distilled water. In fact, water distillation is one of the simplest and most rewarding uses for a copper still, alongside essential oil extraction and hydrosol production.

What Is Distilled Water?

Distilled water is water that has been purified through the process of distillation. The water is heated until it becomes steam, leaving behind dissolved minerals, heavy metals, bacteria, and other contaminants. The steam is then condensed back into liquid form, producing water that is virtually free of impurities.

Unlike filtered water, which passes through physical barriers to trap particles, distilled water has undergone a phase change from liquid to gas and back to liquid. This makes it one of the purest forms of water available.

Benefits of Distilled Water

People choose to distill their own water for a wide range of practical reasons:

• Removes contaminants: Distillation eliminates heavy metals (lead, mercury, arsenic), bacteria, viruses, pesticides, pharmaceutical residues, and other dissolved solids that standard filtration may not catch.
• Eliminates chlorine and fluoride: Municipal water treatment adds chlorine and often fluoride. Distillation removes both, producing water with a cleaner taste.
• Removes dissolved minerals: While some minerals in water are beneficial, others contribute to scale buildup in appliances, hard water spots, and undesirable tastes. Distilled water is mineral-free.
• Ideal for specific applications: Distilled water is preferred for CPAP machines, steam irons, car batteries, aquariums, laboratory use, and certain medical applications where mineral content must be controlled.
• Self-sufficiency: Producing your own distilled water means you are not dependent on store-bought supplies and can produce exactly the quantity you need on your own schedule.

Why Copper Is Excellent for Water Distillation

Copper brings several specific advantages to water distillation that other materials do not offer:

• Superior heat conduction: Copper heats evenly and efficiently, which means your water reaches boiling temperature faster and maintains a steady rate of steam production. This translates to consistent output and less energy waste.
• Natural antibacterial properties: Copper is naturally antimicrobial. Studies have shown that copper surfaces kill bacteria, viruses, and fungi on contact. This means your distillation pathway actively works against biological contaminants.
• No plastic or synthetic contact: Unlike countertop water distillers that use plastic components, a copper alembic still keeps your water in contact with only natural copper. There is no risk of microplastic contamination or chemical leaching from synthetic materials.
• Longevity: A copper still will outlast dozens of disposable or semi-disposable countertop units. It is a one-time investment that serves you for a lifetime.

How to Distill Water with a Copper Alembic Still: Step by Step

The process is straightforward and requires no special training or equipment beyond your still and a heat source.

Step 1: Clean Your Still

Before your first use and periodically afterward, clean your copper still with a mixture of warm water and citric acid or a paste of flour, salt, and vinegar. Rinse thoroughly. This removes any oxidation and ensures a clean distillation surface. See our safety and materials page for detailed cleaning instructions.

Step 2: Fill the Cucurbit

Fill the pot (cucurbit) with tap water. Do not fill it more than about two-thirds full, as the water needs room to boil without splashing up into the alembic head. For a 5-gallon still, this means roughly 3 to 3.5 gallons of water.

Step 3: Assemble and Seal

Place the alembic head on the cucurbit and connect the swan neck to the condenser. Seal the joints with a flour-and-water paste (a traditional sealing method) or food-grade silicone. Fill the condenser vessel with cold water and, if possible, set up a continuous cold water supply to maintain cooling efficiency.

Step 4: Apply Heat

Place your still on the heat source and bring the water to a steady boil. You do not need an aggressive, rolling boil. A moderate, consistent boil produces a steady stream of steam and gives you better control over the process.

Step 5: Collect the Distillate

As steam travels through the alembic head, swan neck, and condenser, it condenses back into liquid and flows out of the condenser outlet. Place a clean glass or stainless steel container at the outlet to collect your distilled water. Discard the first small amount (about a cup) to flush the system.

Step 6: Store Properly

Store your distilled water in clean glass containers. Avoid plastic storage if possible, as distilled water can leach chemicals from plastic over time due to its lack of mineral content.

Expected Output

The output of your copper still depends on its size and your heat source:

• 5-liter still: Produces approximately 1 to 1.5 liters per hour. Ideal for personal use and small quantities.
• 5-gallon still: Produces approximately 3 to 4 liters per hour. The most popular choice for regular home water distillation.
• 10-gallon still: Produces approximately 5 to 7 liters per hour. Best for households with high distilled water consumption or those who want to distill less frequently in larger batches.

Maintenance and Cleaning After Water Distillation

Keeping your copper still in good condition is simple but important:

• After each use: Drain any remaining water from the cucurbit and condenser. Leave the still disassembled to air dry completely. Trapped moisture can lead to unwanted oxidation.
• Regular cleaning: Every few uses, clean the interior with a citric acid solution (1 tablespoon per liter of warm water). This dissolves mineral deposits that may accumulate from the source water.
• Exterior care: The outside of your copper still will develop a natural patina over time. You can polish it with a copper cleaner if you prefer a bright finish, or let the patina develop for a more traditional look.
• Seal inspection: Check the joints and seals before each use. Replace the flour paste or silicone seal if you notice any steam escaping during operation.
• Long-term storage: If you will not use your still for an extended period, ensure it is completely dry inside and out. Store it in a dry location away from humidity.

Start Distilling Pure Water at Home

A copper alembic still gives you complete control over your water quality while providing a beautiful, long-lasting piece of craftsmanship. CopperHolic stills are Handcrafted from solid copper, ship from our US warehouse with free shipping, and come with a lifetime craftsmanship guarantee.

Ready to produce your own distilled water? Browse our water distiller collection to find the right copper alembic still for your home. Need help choosing a size? Our size guide makes it easy. Visit our FAQ page for answers to common questions.