Geberit Silent-db20 Robust connection for strong sound insulation

Triple protection against sound

Whether stack or floor connection – the highly sound-insulating drainage system Geberit Silent-db20 is the ideal solution for projects with high sound insulation requirements:

Premium residential buildings
Hotels
Hospitals
Retirement and nursing homes

Geberit Silent-db20 applications

Building drainage
Conventional roof drainage system

Geberit Silent-db20 is suitable for embedding in concrete.

Many good reasons for Geberit Silent-db20

A Geberit Silent-db20 stack with floor connection

Please select an info point in the picture

Geberit Silent-db20 pipe assortment

Dimensions

Fittings

Geberit Silent-db20 Offset

Accessories

Technical data

Dimensions

Nominal width (DN)	Dimension d x s (mm)
56	56 x 3.2
60	63 x 3.2
70	75 x 3.6
90	90 x 5.5
100	110 x 6
125	135 x 6
150	160 x 7

Geberit Silent-db20 Offset

Perfectly oblique – Geberit Silent-db20 Offset Five benefits at a glance

Tension-free installation:

For axial offsets of up to 10 cm

Easy installation:

Same installation process as for all other Geberit Silent-db20 fittings
Fittings can be aligned by hand

Shorter installation time

Up to one third shorter installation time (compared to installation with two 45° bends)
No installation of a sliding bracket required
Adjustable to any axial offset of up to 10 cm

Flexible solution

A single product to correct axial offsets of up to 10 cm

Better sound insulation

Quieter draining than with a direction change with two bends
No sliding bracket means the transmission of structure-borne sound is reduced

The images from the acoustic camera at a flow rate of 2 l/s with Geberit Silent-db20: With the conventional solution with 45° bends, the airborne sound values increase by 7–9 dB compared to a straight stack. With the Geberit Silent-db20 Offset fitting, the value is almost equivalent to a straight stack.

1. Images from the acoustic camera at a flow rate of 2 l/s in a straight stack
2. Images from the acoustic camera at a flow rate of 2 l/s in a straight stack with Geberit Silent-db20 Offset fitting
3. Images from the acoustic camera at a flow rate of 2 l/s in an installation with two 45° bends

Accessories

Geberit fire protection sleeve for Geberit Silent-db20

Fire protection for Geberit Silent-db20 pipeline

The fire protection sleeves from Geberit can be used for a fire resistance class F 120
Fire tests carried out in accordance with EN 1366-3 for a multitude of different installation types
Approved for a fire resistance of 90 minutes (ETA/ETB) with the Geberit fire protection sleeve RS90 Plus EN

Geberit air admittance valve GRB90 for Geberit Silent-db20

Alternative for installations which do not allow conventional ventilation due to space considerations.
Available for dimensions up to DN110

Technical data

	Geberit Silent-db20
Material	PE-S2
Coefficient of linear expansion	0.17 mm/(m K)
Absorption of linear expansion	Requires expansion socket with double flange or double sleeve coupling
Installation temperature	-20 to 40 °C
Permanent load application temperature	-20 to 60 °C
Chemical resistance	95 % of all standard alkalis, acids and chemicals