When a power outage is expected or occurs suddenly especially during storms, hurricanes, or other natural disasters one of the recommended emergency preparedness tips is to fill your bathtub with water. This might seem like an odd or old-fashioned practice, but there are important and practical reasons behind it.

In this article, we’ll explore why filling your bathtub with water during a power outage is crucial, how to do it safely, and what precautions you should take.

1. Maintaining a Backup Water Supply

One of the main reasons to fill your bathtub during a power outage is to ensure you have access to a reserve of water, especially if your water supply is tied to electricity.

Well water systems rely on electric pumps. If the power goes out, your tap may stop running entirely.

Municipal water systems can still be affected if treatment plants or pump stations lose power or become overwhelmed.

By filling your bathtub ahead of time, you can store dozens of gallons of water for household use.

2. Flushing Toilets Without Running Water

Even without electricity, the need to use the bathroom doesn’t go away. Fortunately, you can manually flush toilets using water stored in your bathtub.

Simply pour about one gallon of water directly into the toilet bowl (not the tank). This usually triggers a gravity flush.

If necessary, remove the tank lid and pour water into the tank to flush more traditionally.

Having bathtub water on hand can help you maintain sanitation during extended outages.

3. Washing Hands and Basic Hygiene

Cleanliness becomes more important during emergencies to prevent the spread of germs and illness especially if you’re handling food, treating minor injuries, or dealing with waste.

The water in your tub can be used to wash hands, faces, or small items.

Even if it’s not drinkable, it’s suitable for non-potable uses like sponge baths or brushing teeth (if boiled or filtered first).

4. Water for Pets and Cooking (With Caution)

Although the water from your bathtub may not be safe for drinking directly, it can be:

Boiled or filtered for cooking and drinking (if you have the means).

Used for pets’ water bowls if it remains clean and uncontaminated.

Always treat bathtub water as non-potable unless you’ve taken steps to ensure it’s safe.

5. Emergency Firefighting or Cleaning

In extreme cases, having stored water could help put out small fires or clean up spills and messes, especially if your home is isolated or emergency services are delayed.

It may not replace a fire extinguisher, but it could help in emergency containment.

It’s also useful for mopping floors, cleaning counters, or washing clothing by hand.

6. Using a WaterBOB or Bathtub Liner for Safe Storage

If you’re concerned about storing water in an open bathtub (where it might get contaminated), consider using tools like:

WaterBOB: A heavy-duty plastic liner that fits inside your tub and holds up to 100 gallons of clean water.

Bathtub bags or liners: These keep the water safe from dust, hair, and other contaminants.

These options allow you to store potable water safely for drinking and cooking needs.

7. Precautions and Tips

Before you fill your tub, keep the following in mind:

Clean the tub thoroughly to remove soap scum, chemicals, and debris.

Use cold water to prevent scalding and reduce bacteria growth.

Keep children and pets away from open water to prevent accidental drowning.

Cover the tub if possible to keep the water clean.

How to Properly Fill Your Bathtub

Filling your bathtub requires a bit of preparation to maximize water storage. Begin by cleaning the tub thoroughly to remove any residues. Rinse out any soap or cleaning products. If possible, use a small portable pump to fill the tub, especially if the main supply is slow during the outage.

Next, let the water run until it reaches your desired level. Consider using a bathtub mat to minimize splash and potential water loss. A full bathtub usually holds about 40-50 gallons, but be mindful of the weight. If a leaking faucet is present, use a bucket to collect the dripping water for other uses.

Common Mistakes to Avoid

One common mistake is underestimating how much water you need. Don’t just fill your tub without planning. Instead, think about your needs, including drinking water, hygiene, and even flushing toilets.

Another error is neglecting to cover the tub after filling it. If dust or debris falls into the bathwater, it can compromise its cleanliness. Use a large plastic sheet to cover the top. This keeps water clean and minimizes evaporation.

Many also forget to check for leaks. A small leak can lead to a significant waste of resources. Inspect the faucets and plumbing before filling your bathtub.

There is more on bathtub drain with standing water elsewhere on the site.

Conclusion

Filling your bathtub during a power outage is a smart and simple step that can provide a valuable water reserve for sanitation, hygiene, and limited cooking use. It’s not a complete solution especially for drinking water, but it can make a big difference during extended outages. For additional tips on water storage during outages, you can check Power Outage Safety Tips.