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Old 03-19-08, 08:32 AM
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Join Date: Aug 2005
Location: Pittsburgh, PA
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Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

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All pumps have a "check valve". It allows the pump to pressurize the air in the barrel and lets the pressurized air flow into the tube but won't let the air flow back from the tube into the pump. That is it does those things if it's working right.

I expect the problem with your pump is either the chamber gasket or the check valve.
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