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.
Are dielectric unions necessary?
Dielectric Unions
It keeps the pipes from actually touching each other because, when they do, they create a corrosive electric charge that deteriorates the pipes and causes leaks. Both the hot and cold water pipes must have this fitting — it’s a code requirement.
Can you use a brass fitting instead of a dielectric union?
What is Brass Fitting? Brass fittings and nipples are also commonly used as a great alternative to dielectric unions for water distribution systems. When galvanized water is exposed to certain water qualities, rust is produced and to prevent that from corroding, brass fittings can be used.
Do dielectric unions fail?
We find many dielectric unions that have started to rust which will eventually lead to a water leak if not remedied.
Do you need a dielectric union between stainless and copper?
When connecting copper to carbon steel or galvanized steel, flanges or dielectric unions should be used to electrically insulate each material. When connecting copper to stainless steel, a brass or bronze fitting between the two metals provides sufficient electrical separation in most environments.
Is it OK to mix brass and galvanized fittings?
Joining two dissimilar metals such as iron and brass causes corrosion due to weak electrical currents flowing between the two metals. This process, called galvanic corrosion, gradually erodes the galvanized iron pipe without harming the brass faucet.
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.
How do you prevent galvanic corrosion on a water heater?
To protect heating elements from galvanic corrosion, have galvanized unions with plastic nipples installed at the top of the water tank. Anode rods. Anode rods prevent corrosion in your water heater by sacrificing their metal in place of the heater’s metal.
What material is a dielectric union 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.
What do dielectric nipples do?
To put it simply, dielectric nipples can be used in any plumbing system to establish a link between two pipes made of disparate metals. One good example of disparate metals used in these systems frequently is the use of galvanized steel and copper.
What are dielectric plumbing fittings?
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.
What metals require dielectric fittings?
In most jurisdictions plumbing codes require the use of a dielectric fitting when joining steel piping to copper or other metals; some plumbing jurisdictions permit use of a 6-inch brass nipple in this location as an alternative to diaelectric fittings.
What metals should not be used with stainless steel?
*Note: the closer the two metals on this list, the less likely they will be to suffer from the negative effects of galvanic corrosion.
Magnesium.Magnesium Alloys.Zinc.Beryllium.Aluminum Alloys.Cadmium.Mild and Carbon Steel, Cast Iron.Chromium Steel (With Less Than Or Equal To 6% Chromium)
Does Teflon tape stop galvanic corrosion?
They used PTFE (Teflon is the most common PTFE) polymer resin tape to isolate the different metals. This new type of barrier proved to be nearly impervious to corrosion.
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