Viega ProPress - Welding Precautions; Welding Adjacent to and In-Line

Installation Instructions
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IM-PP 724607 1218 ProPress
Tube
Diameter
(inches)
Soldering
minimum
distance (inches)
Soldering
minimum
distance (mm)
Brazing minimum
distance (inches)
Brazing minimum
distance (mm)
½ 1½ 38 4½ 114
¾ 2¼ 57 6¾ 172
1 3 76 9 229
1¼ 3¾ 95 11¼ 286
1½ 4½ 114 13½ 343
2 6 153 18 457
2½ 7½ 191 22½ 572
3 9 229 27 686
4 12 305 36 915
Table 18: Minimum distance between existing ProPress 󶈵tting and soldered or brazed 󶈵tting
The installer should take precautions to keep the Viega ProPress
connection cool:
■ Wrap the connection with a cold wet rag.
■ Protect the connection with a weld blanket.
■ Prefabricate solder connections/welded 󶈵ttings prior to installing the
press 󶈵tting. (Ensure tube has cooled before installing the 󶈵tting).
■ Apply heat sink gel or spray or spot freezing
4.5 Welding
To prevent damage to the sealing element, maintain proper welding
distances from the 󶈵tting. If welding adjacent to the connection, weld a
minimum of four inches away.
Installers should follow the precautions listed above to keep the Viega
ProPress connection cool.
4.5.1 Welding Adjacent to a Fitting
To prevent damage to the sealing element, maintain proper welding
distances from the 󶈵tting. If welding in line with the connection, weld a
minimum of three feet away from the connection to protect the sealing
element.
Installers should follow the precautions listed above to keep the Viega
ProPress connection cool.
4.5.2 Welding In Line with a Fitting