What is a dielectric union

May 20- When I starte it was code to install dielectric unions everywhere in houses where copper connects to steel. The theory behind these is simple, you break the electrical continuity between steel and copper pipe in order to prolong the life of the pipes by stopping dielectric. Dielectric union fittings provide a plastic bar between the two pipes, breaking the galvanized current and preventing the pipes from corroding.

Aug 20- To stop this type of corrosion, a fitting called a dielectric union is used to connect the two different metal pipes. I will typically specify a dielectric union to be installed whenever dissimilar metals are joined. When copper and steel pipe are joine the steel . Jul 20- Dielectric plumbing connectors: Building Code Practical Requirements for Dielectric fittings when connecting copper to steel piping.

Application: These unions are designed to be installed between pipe made from dissimilar metals to prevent accelerated corrosion and . Dielectric unions resist corrosion and deterioration when joining pipes made from dissimilar metals. Each includes a union nut, tailpieces, and gasket. Nov 20- I've heard that a brass nipple can be used to join copper to galvanized pipe instead of a dielectric union. A dielectric union is a two-part fitting of dissimilar metals that are electrically isolated from each other to prevent galvanic.

You need to use dielectric unions to connect an electric water heater to a system of copper pipes if the heater came with preinstalled galvanized nipples. HART Industrial Dielectric O-Ring Unions are engineered to provide the most effective and efficient method of preventing electrolytic deterioration. Browse Dielectric Unions: DU in the CIRCOR Instrumentation - Hoke Inc. A,B - Hex Flat,C - Hex Flat,Cx - Hex Flat,E Min,G . Dielectric unions are used to join pipes made from dissimilar metals to avoid electrolysis, which leads to corrosion and pipe failure.

Dielectric Unions (DEU Series), Dielectric Flanges (DEF Series). WEICCO offers the most comprehensive range of dielectric couplers in the industry, with . Note that the unions are NOT at the nipples of the heater. And no mention anywhere of dielectric unions. The nipples on the heater look like .