Table of Contents
When should a dielectric union be used?
Dielectric unions are used to separate two dissimilar metal pipes (such as copper pipes and galvanized steel). Purpose of dielectric unions is to prevent galvanic corrosion, which is caused by electrolysis.
Do you need dielectric fittings on a water heater?
Dielectric Unions If either the tank nipples or the pipes are galvanized steel, however, and you are connecting them to copper, you must use a fitting called a dielectric union to make the connection. Both the hot and cold water pipes must have this fitting — it’s a code requirement.
What are dielectric pipe fittings?
A dielectric union pipe fitting is designed to hold two types of metal pipe together, without actually soldering them. With a copper and an iron pipe, this is necessary as the combination of metals under solder could produce galvanization, leading to corrosion and failure of the pipe.
Why is a dielectric union used?
Dielectric Unions are used in commercial and residential applications to prevent accelerated corrosion and deterioration in the piping system due to galvanic and stray current. It is installed between pipes made from dissimilar metal. We offer dielectric unions in a range of configurations, sizes, and materials.
What is a dielectric fitting used for?
A dielectric fitting is a type of industrial material that isolates monitoring instruments against the effects of electrical current. One of its main purposes is to connect two types of pipe, such as iron and copper. It holds the pipes together, averting leakage and other types of damage.
Do dielectric unions leak?
A dielectric union is a plumbing fitting that is meant to join two dissimilar metal pipes so they don’t experience a galvanic reaction and begin to rust. We find many dielectric unions that have started to rust which will eventually lead to a water leak if not remedied.
Are SharkBite fittings dielectric?
The standard SharkBite fittings (i.e. Coupling, Elbow, Tee) cannot be used as a dielectric union. However, SharkBite Stainless Steel Braided Flexible Coupling Hoses can be used as a dielectric union.
Are water heater nipples dielectric?
Most water heaters come from the factory with dielectric nipples (which are galvanized) with the plastic inner sleeve.
Why do dielectric fittings?
Corrosionpedia Explains Dielectric Fitting A dielectric fitting offers a barrier between the pipes, breaking all galvanized current and preventing corrosion in the pipes. This helps in preserving the pipes and stopping the unintentional production of electricity, which could lead to damage brought by corrosive actions.
What is a dielectric fitting made of?
Dielectric unions are use to join pipes made from dissimilar metals to avoid electrolysis which leads to corrosion and pipe failure. This union is made from galvanized steel and lead-free brass. Plumbing codes in all states require the use of dielectric unions when connecting dissimilar metals.