WaterSafe, the national register of approved plumbers, is issuing guidance to householders on safe hosepipe use, as dry weather continues.
Hosepipes can harbour harmful bacteria, such as Legionella, which has the potential to flow back into buildings and contaminate the drinking water supply.
WaterSafe advises everyone to make sure their tap has a double-check valve installed to help keep drinking water safe.
Julie Spinks, Director at WaterSafe, said: “Hosepipes, if left submerged in dirty water or connected to an outside tap without adequate protection, can act as a channel for contamination.
“Homeowners should understand the risk of backflow and take the necessary steps to prevent it.”
The Water Supply (Water Fittings) Regulations are designed to protect drinking water quality and mandate that all outside taps are fitted with a working double-check valve. This essential component acts as a non-return mechanism, preventing any water from flowing back into the mains supply.
WaterSafe advises homeowners to undertake the following measures:
- Fit a compliant double-check valve to outside taps, such as one approved by BSI, KIWA, NSF or WRAS to prevent contaminated water flowing back into the drinking water supply. The British Standard states these valves should be replaced every 10 years.
- As a minimum, the double-check valve should be installed inside the building, close to the garden tap.
- Gently run water out of your hosepipe before using it, without any form of spray attachment.
- Always keep your hosepipe out of the sun and in a cool place and turn off outside taps.
- Disconnect your hosepipe when you have finished using it.
- Never leave your hosepipe submerged in water, such as in a paddling pool, hot tub or pond.
- Seek expert advice: if you are unsure about the installation or condition of backflow prevention devices on outside taps, consult a WaterSafe-approved plumber.
With water resources under increasing strain, especially during hot weather, WaterSafe would always encourage householders to avoid using a hosepipe, if possible, as it can use up to 1,000 litres of water an hour – equivalent to more than 12 baths!
“The humble watering can is a much more water efficient way to look after your plants, fill your paddling pool or wash your car,” adds Julie Spinks.
For more information on protecting drinking water quality and to find a WaterSafe-approved plumber, please visit www.watersafe.org.uk.