50
Wavin AS+
Technical Manual
Phone. +31(0)38 42 94 951
5.2. General bracketing rules
5.2.1. Bracket Fixing Instructions
Fixed Bracket
The fixed bracket creates a fixed point in the pipe system. The
pipe or fitting cannot be moved through the bracket after the
screws are tightened (no longitudinal movement is possible).
In order to prevent the vertical stack sliding down, each pipe
section between floors must be secured by a fixed bracket.
Every horizontally installed pipe length should always be fixed
with one fixed bracket. All remaining pipe brackets (vertical
and horizontal installation) must be sliding brackets. Taking
the prescribed bracket distances into consideration. Use
sound absorbing brackets, dimensionally compatible to the
pipe diameter. Screw-pipe brackets with rubber inserts are
recommended, which are fixed to the wall by screws and
plastic plugs.
Sliding Bracket
By using sliding brackets, the pipe can still expand and con-
tract due to temperature changes after the screws are tigh-
tened. This make sure longitudinal movement is still possible
once installed.
Changing from siding to fixed
Wavin low noise brackets are usable as sliding and as
fixed bracket. All brackets provided by Wavin are sliding
as standard. To change the bracket from sliding to fixed, a
distance washer is removed from the bracket before instal-
lation. The sliding and fixed brackets can both be completely
tightened until the bracket ears touch the distance washers.
The distance washers make sure that in any situation, the
clamping force on the pipe is perfect. This results in minimal
structure borne sound transmission. The distance washers
also prevent over-tightening of the brackets, which could
otherwise result in a reduction of sound performance.
5.2.2. Bracket Arrangement
During installation of Wavin AS+ pipes, the following should
be considered:
In case of horizontal installation, the pipe bracket spacing
should be according to table 21 the outside diameter of
the pipe. In case of vertical pipe installation, depending
on outside diameter, max 2 meter
Generally, pipe brackets should not be installed in impact
areas (eg diameter reductions and changes of directions
in the system)
Pipe brackets to be fixed to building materials with high
specific area weight
For stack pipes in open mounting shafts and high rooms
(storey height over 2.5 meters) it is advised to use one
fixed bracket and one sliding bracket per pipe length
In buildings under 3 storeys, the fixed bracket must be
installed directly above the fitting at the bottom of the
pipe end. The sliding bracket must be installed at a dis-
tance of maximum of 2 meters above the fixed bracket.
This pattern should be repeated on the following floors
In multiple storey buildings (from 3 storeys and more) the
stack pipes of 110mm must be secured by additional
fixing (stack pipe support) to prevent sliding. In this case
we advise using the Wavin AS+ socketed short length
with a fixed bracket
Fixed bracket
* removed distance
washer
Sliding bracket
* distance washer in
place
