Installation Instructions
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IM-PP 724607 1218 ProPress
4.3.1 Transition Fittings
4.3.1.1 Threaded Connections
The Viega ProPress systems can be joined with off-the-shelf threaded
fittings made of non-ferrous metals.
In this regard:
■
The threaded connection is made first.
■
The press connection is made second.
This process avoids unnecessary torsion on the press fitting.
4.3.1.2 Flange Connections
When using Viega flanges, bolt the flange end in place prior to pressing the
fitting to the tube.
4.3.2 Minimum Distance between Fittings
To ensure a correct press, a minimum distance between press fittings must
be maintained. Failure to provide this distance may result in an improper seal.
For installations where the minimum distance is zero, it is particularly
important to ensure the correct insertion depth of the tube into each fitting.
Tube Diameter (inches)
A minimum (inches)
A minimum (mm)
½
0
0
¾
1
1¼
7
/
16
10
1½
⅝
15
2
¾
20
2½
⅝
15
3
4
Table 3: Minimum distance between press fittings
minimum
distance
4.3.3 ProPress Jaws Clearance Requirements
The minimum distance between tube, or the tube and the wall/ceiling
construction, must be taken into consideration in the planning phase for a
problem free work process. The following illustrate the clearance requirements
for the jaws and fittings and the procedure for pressing fittings in tight quarters.
Tubing installed too closely together
Connection may leak
■
Adhere to minimum intervals between fittings.
■
Insert tube to full insertion depth before pressing.
