Harbor Freight portable air tank pressure gauge

Question

Does the gauge on a HF portable air tank read the pressure of the item being filled when the control is set to let air out of the tank?
I just acquired one of these and the gauge works fine when I'm filling the tank, but I want to be certain I'll be reading the pressure in the bag before I try to use it to fill my air bags. They don't take much to fill and I don't want to over fill them.

gbopp · Answer

Harbor freight Portable Air TankI always thought the gauge showed the pressure in the tank, not the pressure in the item being filled. Maybe I'm wrong. It wouldn't be the first time.

littlebill · Answer

it does, it has no idea of the pressure that will be going in the wheel

azpete · Answer

short answer is no.  the purpose of the gauge is only to show the pressure of the air tank. nothing more.

jmcgsd · Answer

azpete wrote:short answer is no.  the purpose of the gauge is only to show the pressure of the air tank. nothing more.Durn! I was afraid of that. Maybe I'll try replacing the hose with one that has a gauge.

fj12ryder · Answer

I don't think you'll have much luck finding a "hose/gauge" combo that will be accurate enough for your bags. Pick up a digital gauge instead. That's what I use and it seals well enough that there's very little change when checking.

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Harbor Freight portable air tank pressure gauge

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