The designation W270 is a quality classification, describing a test method for determining microbial growth on materials in contact with water.
An accredited laboratory tests the shower hoses and issues a certificate if the test is conclusive.
This test guarantees enhanced protection against biofilm, reduction of bacteria and material odors, especially with hot water. This should in no way be compared to the ACS or KTW.
This additional W270 certification is increasingly requested by hotels, hospitals, retirement homes and municipalities.
Hoses with the designation W270 from Novotec are technically a generation ahead.