Quote:
Originally Posted by Ghostt
Might I add you only need to apply the vacuum once, if you have to keep the vacuum up, then your petcock is bad, and need to be rebuilt.
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I'm probably misunderstanding you, but as soon as vacuum is released, the petcock will close. Maybe you mean that if you have to keep moving the syringe's plunger, for example, the diaphragm has a leak.