Hey folks,

I'm working on a small shurflo 4008 vacuum system. I had read and seen videos of folks getting 20-23inhg, but I only seem to be getting 13-14inhg at the pump.

I've checked and resealed the only fitting between the pump and my gauge and it doesn't seem to make any difference. The interesting thing is that even if I isolate the pump with a ball valve on the either side of the pump and shut the pump off, it still looses vacuum. I'm starting to conclude that the pump housing itself has a leak. Current setup: https://imgur.com/a/CBGhDx5

Anyway, how much vacuum should I expect to get using this pump? Has anyone else run into an issue like this?