7 or 8 years
The first peak for children
to stop bed wetting is age 3 - 4 years.
Most pediatricians and pediatric urologists don't consider bedwellinf abnormal under 7 years. 85% of children are dry at night by age-5-years. At age 5 years you can start restricting fluids after supper +/or toileting the child when parents retire. Either or both these simple measures can make a difference between wet and dry.