Why do developed countries popularize stainless steel water pipes?

1, developed countries attach great importance to the safety of residents' water use and should choose water pipelines with high sanitary grade. 2. Stainless steel water pipes have been used in developed countries for more than 50 years, and no disadvantages have been found, which will naturally be popularized. 3. The labor cost in developed countries is high. If plastic pipes or other pipes are often used for maintenance, it will cause high labor costs and high complaint rate to the government.