Does washing with leftover water save money?

washing with leftover water

Is it possible to save money by washing with the remaining bath water? This time, we have summarized how to wash with leftover water, precautions, whether it saves money, germs and odors, etc. If you’re thinking of using leftover hot water to wash your clothes for the sake of ecology and saving money, please take a look.

Can the leftover water from the bath be used for washing clothes?

I’ve been trying to save money recently, but… the water bill is expensive, isn’t it? Can’t you save some money?

How about using the leftover water from the bath to wash your clothes? Laundry uses a lot of water, and since it’s a daily thing, I think it will lead to a reduction in water bills.

Eh, do you use the leftover water from the bath for washing? can you do that? It’s kind of dirty, isn’t it?

Is it effective to save money by using the remaining bath water for washing? This time, we will introduce how to wash with the leftover water of the bath, and the precautions. Isn’t it a little dirty to wash with leftover water…? Some people may feel that. I will also explain whether the dirt will really come off, and also about the bacteria and odors that are worrisome. Let’s think about washing with leftover water from the perspective of saving and ecology.

How to transfer leftover bath water to the washing machine

How do you use bath water for washing? Maybe I’ll carry it in a bucket…?

When you first try to use the hot water from the bath for washing, you may be confused about how to transfer the hot water. It’s hard work to use a bucket or a washbowl, and spilling hot water can add to your work. Use a hose with a pump to transfer hot water from the bath to the washing machine. Some hoses with pumps are included with the washing machine, but they are also sold separately. Use a length that is long enough to reach the washing machine from the bath at home.

How to use the pump

There is a water supply port for bath water, so if you connect the pump there and put the other side in the bathtub, the bath water will be automatically added. Washing is basically done once and rinsing twice, but if you set only washing to use bath water, rinsing will automatically be done with clean water from the tap. It doesn’t take much effort to supply water from the hose and wash clothes, but many people seem to avoid the hassle of managing and cleaning up the hose.

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Is it possible to save money by using the remaining hot water for washing?

It’s easier than you think to use leftover hot water for washing! But how much can you save on your water bill each year?

Can you really save money by using leftover bath water? You use a lot of water for washing. Even the pump is electric, so it should cost you electricity. I’m trying to figure out how much money I can actually save. If you are thinking of using leftover hot water for washing to save money, please calculate the number of times you wash your home and your water bill.

save money

Approximately 100 liters of water is used for one wash (8 kg) at a typical household. The national average is 0.3 yen per liter, so one wash costs about 30 yen. By using the remaining hot water in the bath, you can save about 3,000 to 5,000 yen a year on your water bill. However, it costs about 1,000 to 3,000 yen to purchase the pump and hose, and the electricity bill for the pump costs about 1 yen each time, so it seems better to think in the long term. There are many people who get frustrated because it takes time and it is difficult to see results in saving money, but “even dust piles up and becomes a mountain”.

be eco friendly

It’s true that saving money is important, but using leftover hot water for washing also saves water. We have to think about protecting the environment from home!

Not only will you save money, but you will also save water. It’s also good for the environment, so using leftover bath water for washing is very eco-friendly. The leftover water from the bath can also be used for cleaning various places and washing your own car, so even if you think it might be a bit dirty to use it for washing, you can use it without worrying about cleaning the toilet or cleaning the veranda. Isn’t it?

Are you okay with dirt and odors in the water?

Isn’t the leftover water in the bath a little dirty after all? Is it okay to use it for laundry?

Washing with the remaining hot water has the advantage of making it easier to remove dirt. Also, you should try to keep the water as clean as possible.

Some people may find it dirty to wash clothes and towels with the remaining hot water after bathing. It seems that many people avoid washing with leftover hot water for physiological reasons rather than saving money and water. Is it possible to clean the laundry properly using the leftover water from the bath? Also, are bacteria and odors okay?

Laundry can be washed clean

It’s a stain on clothes, but it can be removed by washing with the remaining hot water. Washing in warm water from a bath makes it easier to remove stains from laundry because the temperature is higher than cold water. Especially in winter, the water temperature is low, so washing with the remaining hot water in winter is also effective in removing dirt. Detergent also dissolves better in hot water. There aren’t many detergents these days that don’t leave residue, but there’s a sense of security that the detergent will dissolve well.

almost zero odor

Even when washing with the remaining hot water, it is rinsed with clean water from the tap, so it seems that only a few people feel the smell. The point is to keep the hot water as clean as possible when bathing, and to keep the hose, pump, and washing tub clean. I will also explain below what you want to be careful about when doing laundry with the remaining water in the bath.

I see! There is also a good side to washing with leftover water. It’s a little time consuming, but I’ll give it a try.

Please pay attention to the following points.

Precautions when using leftover bath water

When using leftover bath water, there are a few points to keep in mind in order to wash clothes cleanly. After all, it is a fact that there are some bacteria and dirt because it is a bath after people have entered. However, you can wash your clothes with hot water after taking a bath. In order to wash your clothes without worrying about the remaining hot water after bathing, please follow the points below.

Note 1: Use bath water cleanly

First of all, it is important to use clean bath water. After taking a bath, wash your body thoroughly before soaking in the tub. Depending on whether you enter the bath while your body is dirty or whether you use it after thoroughly cleaning it, the dirtiness of the hot water in the bath will change considerably. Also, scoop up any dust or hair after bathing. It can get tangled in the laundry or stain the washing machine. If you have used bath salts, it is better not to use them for washing.

Note 2: Wash at night

Washing with leftover water from the bath has a great advantage because the water is warm. Warm water is better at removing stains from laundry than water. Also, if you leave the hot water in the bathtub overnight after bathing, the bacteria will increase greatly. It is said that the number of germs increases 1000 times overnight. When washing the next day, the water in the bathtub will dry up and you’ll end up using cold, dirty water.

Note 3: Keep the washing machine etc. clean

If you use leftover water to wash your clothes, the washing machine tends to collect dirt such as hair and dust. If you don’t keep your washing machine’s garbage net and washing tub clean, the quality of your laundry will be the same even if you don’t use the remaining hot water. Also, pumps and hoses are easy to get dirty because the remaining hot water passes directly through them. Drain the hose every time so that no water remains in it, and disinfect it from time to time. If you clean the bath kiln regularly, the bath water will be cleaner before bathing.


Whether or not to use the remaining hot water after bathing for washing clothes is a big issue. Many modern detergents do not leave much residue, so you may not need to force yourself to use leftover water for washing. However, using leftover water for washing is not a problem, and it saves money and saves water, albeit a little. How about giving it a try in winter, when the effect of washing with leftover water is particularly large?