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Any kind of fitting that helps connect two different types of tubing, such as copper and galvanized steel, or threaded and solvent weld, or two different sizes that are usually incompatible.- A dielectric fitting connects pipe of dissimilar metals (such as copper and galvanized metal) to prevent corrosion in the copper pipe.
- Two main types, reducers and bushings, are used to convert from one size to another.
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