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Not only the Netherlands is using such a system as similar systems are appearing all over the EU.
One of the essentials is the total system design wherein all the 'dead-legs' are as short as possible or/and minimized to prevent stagnation and where the total system including houses and other delivery points is constantly active in flow - with a target of of approx 9ft./sec. (2.75 M/sec) within the piping to retard bacterial, etc. growth.
Ozonation is becoming more widely used in the EU but the system has to be constructed of ozone resistant materials - expensive first cost.
One of the essentials is the total system design wherein all the 'dead-legs' are as short as possible or/and minimized to prevent stagnation and where the total system including houses and other delivery points is constantly active in flow - with a target of of approx 9ft./sec. (2.75 M/sec) within the piping to retard bacterial, etc. growth.
Ozonation is becoming more widely used in the EU but the system has to be constructed of ozone resistant materials - expensive first cost.