As a general rule, a valve stem which closes to the right (clockwise)
will be your hot right hand threaded stem. If the valve stem
closes to the left (counter-clockwise) it will be your cold left hand
threaded stem. Not every stem follows this guideline. Exceptions
include the Acorn, Chicago, Crane Dial-Ease and other brands of
stems which do not close downward against a seat. These style
stems close upwards against a seat surface. Faucets with round
or square handles almost always close to the right (clockwise) on
hot and cold sides. For replacement stems, order the right hand
thread in this case.
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