DO fit a compliant double check valve to garden taps. The british standard (BS EN 806-5) states check valves should be replaced every ten years.

“The water supply (water fittings) regulations which keep drinking water safe specify outside taps should always have a double check valve to prevent backflow. “Homes built since 1999 typically have ...

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.

DO fit a compliant double check valve to garden taps. The british standard (BS EN 806-5) states check valves should be replaced every ten years.