I stopped selling my earlier pump because of the leaky release button.. I never used the release button, I just bleed the pressure off slowly when removing the gauge. My new one is better, but you can make your own also.. I don't add a glycerin gauge, as that raises the purchase price too much, but they are a great addition. I use WD-40 or gasoline when checking PO pressures, as the needle & seat must be wet to show accurate pressures.
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