It is forbidden to distribute water pipes on the ground in the bathroom. Under what circumstances is it necessary to walk on the ground?

1, which is not explicitly stipulated in the national standard. However, it is stipulated that high-pressure pipes cannot walk on the bathroom floor. 2. It is not recommended to walk the water pipe on the bathroom floor, which will have an impact on waterproofing and threshold, and there are great hidden dangers. 3. The water pipes of floor heating and radiator are helpless, and they can only walk from the ground. Conditionally, it is recommended not to walk from the ground when climbing the wall for more than 30cm.