Ok cool, can you go somewhere else and spread your bullshitVacuum is on the other side of the pressure scale, like outer space is -32Hg. I may need a larger rotary vane pump for my vacuum oven as it has a large area to evacuate that air from. I may not by feeding one head into the other and making a series connection w the stainless steel lines, as to increase the volume. As pictured, it is in a parallel connection w both heads running side by side vs in front of the other.View attachment 3134263