MODIFIED VACUUM TESTER
We all use vacuum to test valve to seat seal. I use a handheld Mityvac in conjunction with an electric vacuum pump. By taking the vent cap off top of Mityvac, I was able to hook the pump directly to it. Now I have the ability to apply, hold and release vacuum with one hand and the gauge is right there on it as well.

Scott Ouellette
Powerplay Engine and Machine
Wilmington, Ma
June, 2019