20
| 304 Challenger
Series
Making a vacuum tester
1� Procure a flange to mount on your 4-way valve, a
short 2” pipe nipple, a 2” pipe cap and a vacuum
gage�
2� Drill and tap a 1/4” NPT thread in the pipe cap�
3� Assemble the flange, nipple, pipe cap and
vacuum gage�
4� Remove a flange from the four-way valve on your
pump�
5� Start the pump and confirm the location you have
chosen to test from is at vacuum�
6� Using the existing O-ring, fasten the testing flange
to your pump�
7� Start your pump and read the vacuum level on the
gauge�
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