Quality
Potable water
Hardness
Porcelain
Pipes
Water supply
Pressure pipes
Water
Corrosion resistance
Vitreous enamel
Valves
Pipe fittings
Testing
Link: ISO 11177:2019 Vitreous and porcelain enamels. Inside and outside enamelled valves and pressure pipe fittings for untreated and potable water supply. Quality requirements and testing
Source: BSI Standards
