The tire valve stem houses the valve core, a small yet essential component that inflates the tire. It uses a poppet valve and a spring-loaded pin that sticks out in the middle of the valve stem.

Your toilet is always there for you. Once you know how to fix the handle, the flush valve, and the fill valve, you'll be able to help in its time of need.

Mr. HP has never closed or opened a shut-off valve that didn't leak at least a small amount of water. The Gordon Wrench is, and has been for years, an indispensable tool in Mr. HP's toolbox.

In a nondescript warehouse off La. 1 on the west side of the Mississippi River, a Louisiana company produces the first line of defense for emergencies on offshore platforms in the Gulf of Mexico.

Pushing down on the pin will release air pressure ... you'll need to insert the hooked end into the valve stem, turn the handle, and pull out the valve stem. But if you have something like ...