First you will want to coat the dielectric fitting with pipe tape.
Galvanized pipe to copper.
Galvanized steel pipes on the other hand are a steel gray color.
You don t need to wrap plumbing tape around the union before you screw it together.
Whenever you join copper water lines to galvanized steel pipe you should be concerned about the corrosion caused by joining two dissimilar metals called galvanic corrosion an electrochemical reaction occurs that causes the steel pipe in this case to rust and clog up.
This fitting joins a copper pipe to a galvanized pipe called a union.
Step 1 tape the dielectric fitting.
Copper pipes are biostatic and inhibit the growth of bacteria.
Plumbing pipes such as pex copper and pvc are normally used depending on their application and the location in which they are installed.
This will keep the water from creating an electric current and causing corrosion and leaks.
Copper plumbing is lead free making it safer than galvanized pipe.
Plastic pipes are usually black and clamps should be visible.
Let s see below the best application for the most common used plumbing pipes.
When connecting a copper pipe fitting to a galvanized steel pipe you must use a dielectric fitting.
If the copper and galvanized pipes aren t the same diameter solder a reducing coupling to the copper pipe.
If the surface of the pipe is the color of a penny then the pipe is probably made from copper.
Also there are some other plumbing pipe types such as black galvanized and brass.
Benefits of galvanized pipes.
When water flows through pipes of two different metals the pipes will become eroded by electrical impulses from the slight acidity found in all water sources.
Copper is the material most often used by today s home builders and homeowners when installing plumbing.
Find the area where pipes enter your home and carefully scratch the pipe with a nickel.
The dielectric fittings commonly available in home centers photo 1.
It s far easier to make a repair to steel pipe with copper than with galvanized plumbing pipe because the galvanized calls for cutting threads on exact lengths of pipe.
Copper pipe is available in small diameters for installation in tight spaces.