How to Heat Up Water in a Tub With No Hot Water

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Things You'll Need

  • Microwave or stove

  • Microwave-friendly bowl or pot

  • Pot holders, oven mitts or thick towels


A microwave will bring water to a boil quicker. However, if your microwave is small and cannot fit large containers, your best bet is boiling the water on your stove. Although boiling water on a stove takes longer, it is safer because the pot is more reliable. Boil as much water as needed to bring the water in the tub to a hot temperature. For instance, if you add the first pot or bowl of boiling water and the water is not hot enough, add another pot of boiling water as well as some water from the tub's faucet to mix it in. If the water is too hot for you once the tub is full, you can drain some of it and adjust the temperature using more of the cold or lukewarm water from the tub.


Make sure to you use a microwave-safe container if you are boiling the water in your microwave. Avoid using glass containers when boiling water in the microwave. Generally, containers will say if they are microwave-safe on the bottom region. Make sure to take the water out of the microwave as soon as it starts bubbling. The amount of time the water will need to be in the microwave depends on the size of the container.

You don't need a water heater to take a hot bath.

Taking a hot bath can be relaxing and therapeutic after a long day at work, or a strenuous workout. If your water heater or any other water-heating source you use needs to be repaired or replaced, or if you simply don't have hot water going to your tub, there still is a way for you to enjoy a hot bath. You can heat up the water in your tub as long as you have a stove or microwave.


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Step 1

Turn on your faucet and fill up the tub half way with the cold, or lukewarm water that comes out of your tub.

Step 2

Fill your biggest cooking pot with water and bring the water to a boil using your stove. If you have a microwave, pour water in your biggest microwave-safe container and bring the water to a boil. You will know when the water is boiling because it will start to bubble. While the water doesn't necessarily need get to a boiling point, the hotter the water, the faster you'll get the tub water to heat up.

Step 3

Grab the pot or the bowl using a pot holder, oven mitt or thick kitchen towel on each hand. This will protect you from getting burned.


Step 4

Take the boiling water or hot water to the tub and pour it into the cold or lukewarm water that was already in the tub.

Step 5

Turn on your tub's faucet to let the boiling water disperse in the tub and mix with the cold or lukewarm water that was already in the tub.

Step 6

Turn off the faucet and carefully stick your hand in the tub to test how hot the water is. The water will not be extremely hot because it has been mixed the with the cold or lukewarm water that was already in the tub. The water temperature will gradually increase as you add more pots or bowls of hot or boiling water. The amount of boiling water you'll need depends on the size of your tub, the size of the pot or bowl you are using to pour water, and how hot you want the water to be.



Herman Cruz

Based in Orange County, Calif., Herman Cruz has been writing since 2007. His articles have been published in various content platforms and he also has written for Internet entrepreneurs who need assistance with writing sales letters and articles for their businesses. Cruz is pursuing his Bachelor of Arts in integrated composition, improvisation and technology at the University of California in Irvine.