Homemade Drain Cleaner

A simple baking soda, vinegar and hot water method to freshen drains, reduce odours, and help with light, slow-draining build-up in kitchen and bathroom sinks.

Best for: slow sinks, mild grease and soap build-up, and drain odours.

Not for: a completely blocked drain, standing water that will not move at all, or a suspected deep pipe blockage — use a plunger or drain snake first, or call a plumber.

Ingredients

• 1/2 cup baking soda (bicarbonate of soda)
• 1 cup distilled white vinegar
• 1 kettle of freshly boiled water, plus extra hot tap water
• Optional for odours: 2-3 drops lemon essential oil, or a strip of lemon peel

You will also need:

• Drain stopper, plug, or an old cloth to cover the drain
• Rubber gloves
• A cup or jug for pouring
• A timer
• Optional: 1/4 cup table salt for the booster method

Step-by-Step Method

1. Clear the sink first. Remove standing water, food scraps, hair, and any visible debris from around the drain. Put on rubber gloves.
2. Flush with hot water. Run hot tap water for 30 seconds, or pour a jug of hot water slowly down the drain to warm the pipes.
3. Pour in the baking soda. Pour 1/2 cup of baking soda directly into the drain. Push any powder that sits on top down with a spoon handle.
4. Add the vinegar. Pour 1 cup of white vinegar slowly into the drain. It will fizz — that fizzing helps loosen light build-up and lift odours.
5. Cover and wait. Cover the drain straight away with a stopper or cloth to keep the fizz working down the pipe. Leave for 15-30 minutes. Do not use the sink during this time.
6. Flush with boiling water. Boil a full kettle. Remove the cover and pour the hot water down the drain slowly, in 2-3 stages, pausing between each pour.
7. Check and repeat if needed. Run the tap and check the flow. For a still-slow drain, repeat the whole method once. If there is no improvement after two tries, stop and use a plunger or snake.

Booster Method — For a Stubborn Slow Drain

For extra grease or soap build-up, mix 1/2 cup baking soda with 1/4 cup table salt and pour it into a dry drain in the evening. Leave it overnight without adding vinegar or water. In the morning, flush slowly with a full kettle of boiling water. Use this only occasionally — salt is not suitable for every plumbing system, so skip it if your pipes are old or damaged.

Use and Safety Checklist

• Use for hand-cleaning sinks and baths only — never pour into a dishwasher or washing machine drain
• Never mix this cleaner with bleach or any commercial drain cleaner — dangerous fumes can form
• If a chemical drain cleaner was used recently, do not use this method — flush well with water and wait
• Wear gloves, keep your face away from the drain when it fizzes, and ventilate the room
• Pour boiling water slowly and carefully to avoid splashes and burns
• Use hot tap water instead of boiling water on plastic pipes, acrylic baths, or if you are unsure about your pipes
• Keep baking soda and vinegar out of reach of children and pets, and label any stored containers
• Stop and call a plumber if water backs up, several drains are slow at once, or you hear gurgling from other fixtures

Prevent Build-Up — Maintenance Checklist

• Weekly: pour a kettle of hot water down kitchen and bathroom drains to melt light grease
• Weekly: clean sink strainers and remove hair from bath and shower drains
• Monthly: repeat the baking soda and vinegar method on any drain that smells or runs slowly
• Always scrape food and cooking oil into the bin — never pour grease down the sink
• Always use a strainer over kitchen and bathroom drains to catch food, hair, and debris
• After hair washing or shaving, rinse the drain with hot water for 30 seconds

Important: This homemade cleaner freshens drains and helps with light build-up. It will not dissolve a solid blockage, tree roots, or a collapsed pipe, and repeated boiling water can damage some plastic pipes. When in doubt, use hot tap water and seek professional help.

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