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4.2 Installation on the end of the pipe
Note:
The valve must not be used as a terminal for the pipe – a cap plug must always be fitted
to the other side of the valve (see Figures 3 and 4).
If the valve is installed onto the end of a pipeline, there is a danger of corrosive, acidic water or air col-
lecting in the empty end of the valve. To prevent corrosion, there must be oxygen-free water in the section
beyond the valve.
Figure 3. The valve must not be used as a termi-
nal for the pipeline
Note:
If the valve and the cap plug are installed as the terminal for a pipeline, the valve must
be completely in the open position. A closed area must not be allowed to arise between
the valve and the cap plug because the valve may be damaged if the water expands in a
closed area (for example, due to a change in temperature).
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Figure 4. Cap plug. There must be at least
200 mm of pipe between the valve and the cap
plug.
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