Installation Guide

Installation Instructions
24 of 44
IM-PP 724607 0320 ProPress
4.3.1 Transition Fittings
4.3.1.1 Threaded Connections
The Viega ProPress systems can be joined with o󶈴-the-shelf threaded
󶈵ttings made of non-ferrous metals.
In this regard:
■ The threaded connection is made 󶈵rst.
■ The press connection is made second.
This process avoids unnecessary torsion on the press 󶈵tting.
4.3.1.2 Flange Connections
When using Viega 󶈶anges, bolt the 󶈶ange end in place prior to pressing the
󶈵tting to the tube.
4.3.2 Minimum Distance between Fittings
To ensure a correct press, a minimum distance between press 󶈵ttings 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 󶈵tting.
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 153
4
Table 2: Minimum distance between press 󶈵ttings
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 󶈵ttings and the procedure for pressing 󶈵ttings in tight quarters.
Tubing installed too closely together
Connection may leak
■ Adhere to minimum intervals between 󶈵ttings.
■ Insert tube to full insertion depth before pressing.