Things that every homeowner should know

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Galvanized Drains



Galvanized pipe can still be bought, and used in some circumstances, but for the most part, it has been out of date for quite some time. Galvanized pipe was connected by threading pipe and screwing it into a threaded fitting using a joint compound(like a thick paste) smeared on the threads.

This type of pipe was extremely time consuming and difficult to work with. In a lot of cases, galvanized drain pipe does last for a very long time. The problem it has(and it's a very serious one) is that it builds up rust on the inside of the pipe over a period of time. This rust usually becomes quite hard, at times almost impossible for a drain snake to clear out. The rust also builds up a very considerable amount of the pipe. An opening about the diameter of a pencil left inside the pipe is not unheard of. The rust is uneven and jagged, which slows the flow and catches debris.

The best thing you can do with galvanized pipe is to remove it. Very often, it is not feasible to remove all of it, so you do what you can based on the circumstances.

The picture above shows the use of a fernco adapter(see the fernco section) to connect old galvanized pipe with newer pvc. This is the common method of connecting to old galvanized.

When faced with an option, it is best to remove as much galvanized pipe as possible. For example, if you're remodeling a bathroom, that is the time to remove this type of pipe, and as much of it as you can. Use fernco adapters to connect to the remaining pieces.

Free Online Plumber does not warrant any of the information on this page, in regards to the accuracy or effectiveness of these procedures or this information. Always check and follow all applicable local plumbing codes.
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