Product Information
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IM-PP 724607 1218 ProPress
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As long as the tube is properly prepped and marked
and the fitting is installed according to Viega’s ProPress
Product Instructions, if there is any deflection present
after the installation of the fitting, the connection is
still acceptable and meets Viega’s manufacturing
specifications for proper installation and warranty.
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Deflection of a press connection has no effect on the
integrity of the system, and it can be pressure tested in
accordance with the ProPress Product Instructions.
Push-pull method
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Rings = Push on press tool.
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Jaws = Pull on press tool.
The press tool can be feathered using the trigger as needed to apply
pulling or pushing force to control deflection.
2.5.9.1 Controlling Deflection
Deflection while pressing can be minimized by utilizing the following
installation practices.
Alternate sides for presses
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Press one end of fitting.
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Make second press on other end of fitting from the opposite side.
Site conditions permitting.
Re-Press
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Press the fitting, once on each side (that is, re-press the fitting a
second time on the opposite side). Pressing the same connection
from the opposite side will usually straighten misalignment between
the tube and fitting.
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When pressing overhead piping, it may be inconvenient to alternate
sides for each press.
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The natural weight of the piping plus pressing on opposite sides at a
45 degree angle should adequately eliminate deflection.
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This technique can also be used for any horizontal piping and also
when working above the piping.
