Field glossaryDielectric fittingAn insulating union or nipple that stops galvanic corrosion where copper meets steelUsed across 2 Anvilfield field guides, most in Plumbing. Where this shows upPlumbingPipe joining methodsPlumbingPEX, copper, and CPVC methods Related termsCold expansionSolvent weldErosion corrosionHeat fusion Back to the full field glossary