Installation and Commissioning
Installation and Commissioning

Drinking water hygiene starts long before the vital provision flows out of the tap. Even during manufacture, transportation, storage and assembly, contamination of the parts that come into contact with water must be avoided.

The same care must be taken during the leakage test, flushing and initial filling of the system as during planning and installation.

 

Transportation, Storage and Assembly
 

All components of a drinking water system must be transported and stored in such a way that internal contamination is avoided. To ensure the perfect condition of the system components, the protective devices must not be removed until directly before assembly. Viega produces protective caps, which make it possible to close steel or copper pipe ends during the installation phase. In addition, Viega connectors and other components are all placed in protective packaging. In this way, all components are protected against contamination and damage throughout transportation right up until assembly.

 

Dry leakage test

 

For reasons of hygiene, it is recommended that leakage tests are carried out dry in large buildings. Dry, oil-free air is used or in systems with higher hygienic requirements (e.g. hospitals) inert gases may be used. The relevant safety regulations should be observed. Dry leak testing is carried out before load testing at a test pressure of 110 mbar. The test period lasts at least 30 minutes at up to 100 litres of piping system capacity and has to be increased by 10 minutes for every additional 100 litres. During this test non-pressed press connectors can be identified. The Viega SC-Contur, which can be found on every Viega press connector, guarantees the identification of non-pressed connections throughout the entire pressure range from 22 mbar to 3 bar.

 

Wet leakage test

 

Wet leak testing is only carried out on systems which will go into operation shortly afterwards (e.g. detatched houses). The system should be filled with filtered drinking water. Viega press connectors which have not been pressed will be visibly leaky up to a maximum pressure of 6.5 bar. If the pressure test is carried out during frosty periods, a dry test is recommended in smaller installations as well.

 

Read on:

Operation of drinking water installations

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Protective caps on stainless steel or cooper pipe ends protect against contamination and damage during transportation and storage.