Product Information
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IM-PP 724607 1218 ProPress
2.5.4 Exposure to Freezing Temperatures
Viega ProPress systems with EPDM sealing elements can be installed
in ambient temperatures down to 0° F. Tubing exposed to freezing
temperatures must be protected per acceptable engineering practices,
codes, and as required by local code.
2.5.5 Underground Installations
Viega ProPress fitting systems with copper tubing are approved for
underground installations. However, installations must meet all state and
local codes, including those for underground. Proper authorization must
be obtained prior to installation from the Authority Having Jurisdiction.
2.5.6 Corrosion Protection
Viega ProPress fittings exposed to corrosive action, such as soil
conditions or moisture, must be protected in an approved manner in
accordance with NFPA 54 Section 404.8, NACE Standard RP0169-2002
Section 5, 2009 UPC Chapter 6 Section 609.3.1, 2009 UMC Chapter
13 Section 1312.1.3, or satisfying local code requirements. In addition,
systems should be properly sized to minimize the risk of erosion corrosion
resulting from excessive velocities.
2.5.6.1 Mixed Installations
■
In water installations, mixed metal systems can have a detrimental
effect on each other and cause corrosion.
■
Copper tubing should not be installed directly upstream from
galvanized steel pipe.
■
Dielectric unions should be used when connecting copper to steel or
galvanized steel pipe.
■
Care should be taken to select hangers of suitable material that are
galvanically compatible with the tubing.
Above ground copper tubing and fittings do not normally require external
corrosion protection with the following exceptions:
■
Contact with aggressive building materials such as nitrite or materials
containing ammonium.
■
In aggressive environments.
Please contact the Viega Technical Services Department for questions on
this subject.
The flow rule must be observed in all mixed installations
with tubing made of copper and pipes made of galvanized
steel.
