Storey installation with ring main

In storey installations with ring mains, the pipework is routed past the tap connections in a meandering pattern, as with a series pipe. However, unlike a series pipe, the ring pipe does not end at the last tapping fitting, but reconnects it to the storey pipe.

This creates a closed ring that supplies each tap with water from both sides of the ring line when in use. This installation method ensures that water flows in every section of the ring pipe every time water is drawn. If a wet room is used regularly, this type of installation ensures that water is changed regularly in all parts of the pipework.

If, on the other hand, a wet room is not used regularly, e.g. because a patient's room is empty or a patient in a hospital or nursing home is bedridden, the operator must also ensure sufficient water changes in this case during "normal operation". Water changes can be ensured by localised flushing measures in the wet room. Flushing measures are carried out either by automated water changing devices or by regular opening of the taps by the cleaning staff. The flushing measures are associated with a considerable loss of water and, if triggered manually, are labour-intensive.