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Do need to use dielectric union when you have black pipe to brass fitting?
Wiki User
∙ 11y ago
Brass and steel are compatible, Otherwise we could NOT use brass valves with steel piping.
Wiki User
∙ 11y ago
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Can you use brass as a dialectric union between copper and black iron pipe?
No, brass cannot be used as a dielectric union between copper and black iron pipe. Dielectric unions are typically made of materials that are not electrically conductive, such as plastic or rubber. Brass is a conductive material and would not provide insulation against galvanic corrosion between copper and black iron pipe.
Can you join brass with steel without dielectric union?
Yes
Why Using a dielectric union to join galvanized and copper water supply pipes?
Dissimilar metals in contact to each other cause a Galvanic Reaction resulting in one or both metals corroding and causing a leak. A Dielectric Union separates the two metals by uses of rubber and/or plastic thus preventing a Galvanic Reaction. Also in most Plumbing Codes, you can use a Brass fitting in place of a dielectric union as Brass does not react with Copper or Steel Piping (Galvanize Piping).
What is the name of the fitting used to connect the water lines to the water heater?
Dielectric union
Can you connect a copper fitting into a cast iron pipe without a dielectric union?
Certainly, if the pipes are kept dry, and don't carry an electrolyte, such as water.Otherwise, it's a bad idea to directly connect different metallic pipes. In fact, most plumbing codes prohibit such a connection.That's because anytime any two dissimilar metals contact each other -- while in the presence of an electrolyte -- whichever metal has the higher electropotential will corrode, through electrolytic action.So, in the case of copper vs iron, the copper side of the joint will eventually fail due to corrosion -- unless you electrically isolate the two metals.You can do this via a dielectric union, or dielectric nipple. Or, you can use a hardened brass fitting, which resists corrosion and also smooths the dielectric potential between the copper and steel.Of course, another author may have a different opinion (like the one below.) So my advice is to understand the 'why' of electrolytic corrosion, so you can determine whether or not, in your case, a dielectric union is advisable.####Of course , NO Problem and there are many ,many options of doing so.The electrolytic conditions happens when connecting ferrous metals to non ferrous metals that contain zinc (galvanized) if you think about it EVERY SINGLE CAST IRON RADIATOR has a brass shut off valve, Most black steel gas line have a BRASS gas valve. Brass bolts are the best way to go when installing CAST IRON ROOF DRAINSAlso why use a dielectric union when there are dielectric nipples less chance of leakage
Is it safe to use copper and galvanized pipes on the same fitting?
No, you cannot join copper and galvy directly. A brass fitting needs to be between the two to prevent electrolysis. You could also use a special type of union that has a gasket between the two halves. It is called a Dielectric union. If this junction is between pipes on your water heater and the cold water supply line, you could use a fitting made for that that also is a back flow preventer (ie a check valve).
What do you need to connect copper to galvanized pipe?
Yes. Use a threaded fitting, male or female as needed on the copper and screw the galvanized into it.You must use a dielectric fitting to connect copper to galvanized pipe. If you don't, a galvanic reaction will occur and the piping will corrode and leak. You can use a Dielectric Union or a Threaded Brass fitting to join the two types of piping together.UNIONS can leak the best answer would have been a dielectric nipple
Can a 2.5 galvanized dielectric union be used to connect black pipe to copper pipe?
Yes
In what direction must a black gas line union fitting be facing?
Makes no differance. The pressure of gas is very low and is not affected by the shape of the fitting or the way it goes on. the union should be furthest away from the unit.
Difference between coupling and pipe union?
A coupling is a threaded or soldered solid fitting, a union is a fitting that joins two pipes and can be taken apart with wrenches.
Is there such a thing as a flow directional pipe-fitting union?
yes
Can you screw a copperfitting into a cast iron pipe without a dielectric union?
Of course NOT A Problem as electrolytic action most of the times happen between piping that contains galvanized coating (Zinc) Cast Iron radiators for example have BRASS valves which can contain as much as 85% copper If one looked at the clean outs of cast iron piping the CO's are brass with never any adverse actions
