Spain has 372,500 caravanning vehicles: 244,000 caravans, 100,000 motorhomes and 28,500 campervans. To prepare the water system for winter, some owners place an inflated balloon over a tap and squeeze it to blow residual water out of the pipes. The DGT has published Instruction PROT 2026/04 of 11 March 2026, setting technical inspection intervals for camper vehicles based on the category in their registration document: category M motorhomes are inspected like passenger cars, while converted category N vans are inspected annually up to 10 years and then every six months.