Households could cut water use by nearly a quarter (24%), and corresponding cost from heating bills, by using the eco button advises the Association of Manufacturers of Domestic Appliances (AMDEA).

According to AMDEA, by using the eco button on a dishwasher and washing machine, and taking a daily five-minute shower instead of a bath, households could reach official targets to reduce water use set for 2037.

The average personal daily water usage is 144 litres in England, and official targets aim to cut this to 122 litres by 2037, with Scotland, Wales and Northern Ireland at 180, 150 and 145 litres respectively.

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AMDEA reports using eco programmes for both dishes and laundry can save 15,000 litres a year, compared to ordinary cycles, and taking a short shower instead of a bath uses 40 litres less each time.

Further, it states each shower taken, instead of a bath, saves nearly 19p in energy, that’s £165 off the average home energy bill each year through less water being heated.

A study – commissioned by AMDEA as part of its Know Watt’s What campaign – found 30% of people rarely or never considered water conservation when choosing a washing machine cycle, and 25% took the same view with dishwashers.

Many respondents were also unclear about how much water an eco cycle saves and over a quarter (27%) admitted to not knowing.

One in ten (10%) thought eco cycles used a little or a lot more water.

When asked to select which one of three cycles they thought used the least amount of water, more than half (54%) believed eco cycles used least water, however, more than a third (37%) thought it was the quickest or hottest wash.

And more than one in four admitted not knowing whether eco cycles use more, less or about the same amount of water as a non-eco cycle.

The study, conducted by YouGov also revealed the main motivator for those households concerned with saving water was the desire to reduce bills (72%) as opposed to protecting the environment (65%) or ensuring future generations’ access to adequate water (46%).

However, it also suggested people appear oblivious to the link between running costs and water usage in washing machines and dishwashers, for which heating water is the main cost.

Price and affordability scored highest with 75% as consideration factors when buying a machine, then came energy rating and running costs at 70% but only just over a third (36%) gave thought to water usage.

The majority also drastically underestimated how much water they use in their homes.

Half the respondents (50%) underestimated their water usage per person by at least 30%, while 42% said they simply did not know how much water they used, even though 59% of all respondents admitted to having a water meter.

AMDEA chief executive Paul Hide said: “Showers, dishwashers and washing machines have become much more water and energy efficient over recent years, but it seems many people are still not taking advantage of the clever tech they have installed in their bathrooms and kitchens.

“AMDEA’s award-winning Know Watt’s What campaign reminds householders to make those small changes to the way they use their appliances, that can make a big difference to their domestic bills, their water consumption and the environment.”