3
5 System installation
34
5.1 Spacing for bracketry
34
5.1.1 Guide brackets
34
5.1.2 Bracketry for Geberit Silent-db20
35
5.2 Managing thermal movement – above ground systems
36
5.2.1 Controlled expansion
36
5.2.2 Deflection leg – guidance on use
40
5.2.3 Rigid fixing
41
5.2.4 Suspended rail system
43
5.3 Waterproofing
44
5.4 Fire protection
45
6 Alternate stack ventilation system
46
6.1 Geberit Sovent overview
46
6.1.1 Geberit Sovent – planning
46
6.1.2 Geberit Sovent – stack sizing
52
6.1.3 Geberit Sovent – installation
52
6.2 Geberit air admittance valve overview
53
6.2.1 Geberit air admittance valve – GRB90
53
6.2.2 Geberit air admittance valve – GRB50
55
7 Buried drain systems
56
7.1 Buried drain systems – overview
56
7.2 Trench details
57
7.3 Managing thermal movement – buried drain applications
58
7.4 Rigid installation – embedded in concrete
59
7.5 Pipes penetrating through building walls
60
7.6 Connection to manhole
61
Appendix: Chemical Resistance
62
Drainage Systems Installation Guide
Contents
