It is quite right to say that it involves the certification of 1 building. In addition to these, WELS water-saving certification is also mandatory when applying for watermark certification for faucets in Australia. France has NF and the Netherlands has KIWA.
At present, our company (Zechang) has been authorized by KIWA, HY Laboratory (KTW/W270), DVGW and VDS in China. Official authorization from WRC-NSF Laboratory (WRAS), IAMPO and LGA in China.