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weep hole

   Also found in: Wikipedia 0.02 sec.
weep hole [′wēp ‚hōl]
(civil engineering)
A hole in a wood sill, retaining wall, or other structure to allow accumulated water to escape.


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During engine start-up and shutdown, whether the engine is installed or out for ground hop operations, you may observe oil dripping from the drainage and weep holes on the engine's recuperator.
On brick facilities, look for weep holes, which are used for proper ventilation, and fit them with screens to prevent insects from getting in.
The term "weep hole" is derived from the fact that, when the weep hole drinking fountain or yard hydrant is shut off, a hole in the side of the valve opens to drain all the water from the riser into the soil below the frost line.
 
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