Galvanized Water Pipe To Copper

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.

Galvanized water pipe to copper.

Ideally the old galvanized pipe should be replaced. Add a new galvanized steel pipe length nipple at each end and solder in your copper. Galvanized pipes are steel pipes that have been dipped in a protective zinc coating to prevent corrosion and rust. Wrap plumbing tape around the threads of the galvanized pipe and screw the galvanized half of the union to it.

Next connect copper pipes together until you reach the galvanized pipe threads. What are galvanized pipes. 4 remove the washer from the central nut of. The connecting points of two different pipe materials becomes rotted by galvanic corrosion in a relatively short period of time.

Copper plumbing can also introduce a metallic taste to water. Most new homes built in the 1980s used copper for indoor plumbing. Copper pipes are susceptible to the formation of condensation inside the pipe. The process of dipping steel pipes into molten zinc to galvanize them has been around since the early 19th century and galvanized pipes still are common in outdoor and industrial water systems.

If this condensation freezes it can restrict or even block water flow. The easiest way to connect the copper and galvanized pipes is to use your wrench and unscrew the galvanized piece from the connecting threads. A prime example of this is when galvanized pipe is connected to copper or brass. Use sandpaper as needed for cleaning pipe then take the union apart and solder the brass end to the copper and screw the steel end to the galvanized pipe.

Copper plumbing pipes can sometimes fail when water temperature is above 180 degrees. Copper is smaller and lighter than galvanized steel pipes which makes them easier to work with and install. Finally join the two ends with the large nut. As early as the 1960s galvanized pipes started being replaced with copper.