Setting up a magnehelic

[Shabaday]

Throw a tiny bit of teflon tape on that hose barb

I just came here to post that after I saw that picture!

 

[Wibble]

Typically measured in Inches of H20 round here. Can be tested by actually measuring the cracking depth when submerging it face down in water.

Very general for more common regulators: "Close" to 1" for a primary with the field adjustment knob (if there is one) set to easiest. Higher for primaries without cracking adjustments and octos/secondaries to reduce fre-flow.

Thanks for that. I thought it was a typo as inches of mercury is (I believe) what anaesthetists use. At the very light vacuums measured for cracking resistance it makes a better measure.