Viega 4987.2, Инструкция по эксплуатации, Страница: 8 / 14

1
5
4
2
3
Fig. 2: Correct place of installation of the backflow trap
1 - Street = Backflow level
2 - Area safe from backflow
3 - Connection upper floor
4 - Area at risk of backflow
5 - Protection against backflow through backflow trap
The connection of the upper floor (3) onto the underground pipe must
be made between the backflow trap and sewer within the building (5) –
only then is it possible to ensure that the wastewater system can func-
tion faultlessly. To ensure that drainage is permanently guaranteed,
backflow traps may not be employed as the central safeguard for a
building with drainage equipment installed above the backflow level (1) –
in the event of backflow, it would lead to flooding in the building due to
wastewater being unable to drain away (4).
See Ä
„Regulations from section: Place of installation and installation
conditions“ on page 6
Backflow seals should be installed in such a way that they are always
accessible.
2.2.3 Maintenance
Maintenance must be carried out twice a year to ensure safe operation.
See
Ä
Chapter 3.3.1 „Maintenance“ on page 11
Product information
Grundfix backflow trap type 1 8 from 14