Hot tubs have become increasingly popular over the past decade, with places like Aldi and Asda regularly selling the device as special buys.
But if the proper checks are not carried out, the water can cause a range of dangerous infections – including legionnaires disease. This is a particular concern for people who rent out their homes to guests because they could end up with a huge bill that their insurance won't cover.
William McCarter, of rural insurance broker Lycetts, said: “All too often, people tend to skip over the small print regarding the potential health hazards. “If they ignore the regulations around taking water samples, and someone falls ill, their public liability insurance will be void and they could end up paying out thousands of pounds.”