Finding vacuum leaks
Problem: Typical vacuum petcocks are factory greased. After several years, the grease dries out and they leak. Finding leaks in vacuum petcocks in lab or processing areas is difficult.
Solution: Place a rubber pipette bulb over each petcock inlet. If the petcock is leaking, the pipette bulb collapses within seconds.
Contributor: Michael J. Bandy, Eli Lilly & Co., Indianapolis, IN; 317-276-9165