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Posted by Harold Kestenholz - hydronic.net on March 21, 2002 at 09:07:57:
In Reply to: why a plug is fitted before pressure gauge on natural gas line posted by leen on March 21, 2002 at 04:55:20:
Pressure on gauges on oil lines, water lines or steam lines is often much higher than gas pressures, the gauge is more sensitive and needs protection from dust and liquids.
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