Install Instructions

Viega IM-MTL 0612
724607
12
5.4 Transition Connections
Threaded Connections
The Viega Metal Systems 1/2" – 4"
can be joined with off-the-shelf threaded
fittings (thread in accordance with DIN
2999) or armatures made of non-ferrous
metals.
In this regard:
j The threaded connection is made first.
k The press fitting is made.
This process avoids unnecessary torsion.
Flange Connections
When using Viega flanges, bolt the flange
end in place prior to pressing the fitting
to the tubing.
5.5 Pipe Supports
Pipe supports perform two functions.
The first function is to provide support
for the piping system.
The second function is to guide the
pipe or tube during thermal expansion
and contraction. Industry standard
practices and guidelines shall be used
for piping layout and support. Viega
press connections require no special
consideration for support.
5.6 Minimum Space
Requirements for the
2-1/2"- 4" Press
Fittings Upstream
and Downstream
from Components
If 2-1/2" – 4" press fittings will be
installed immediately upstream and
downstream from ceiling penetrations,
then ensure that the space required for
Viega system pressing tools is available.
Minimum distance requirements for the
respective Viega system pressing tools
are listed in 5.2 and 5.3.
Pipe Size
Minimum
distance
requirement
a
330-B 330-C
2-1/2" – 4"
2"
(50 mm)
2"
(50 mm)
Table 5.2: Distance requirements for
pressing tools for XL press fittings
upstream and downstream from wall/
ceiling penetrations
a
min