Anode (in water heater) A anode is a sacrificial metal rod placed in a water heater that will selectively corrode due to dissimilar metal electrolytic corrosion.
Askew A line or plank installed so that it is not aligned with other objects of similar nature. The line or plank is said to be askew.
ASTM Abbreviation for American Society for Testing and Materials. The society establishes the acceptable range of product usefulness based on tests.
Awl A sharp pointed tool similar to an ice pick that is usually used for scribing a metal surface or punching holes.
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