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Miscellaneous

Can a vent pipe also be a drain pipe?

Can a vent pipe also be a drain pipe?

A wet vent also serves as a drain line but is large enough that it never actually fills with water. In some cases, local codes allow for other venting strategies. For instance, a basement sink might be vented with a special wall vent, which simply runs out the wall.

How is a cast iron drain line connected to a copper line?

Our photograph of cast iron drain piping (below left) demonstrates two methods by which connections have been made to newer copper drain lines. At upper left a black plastic hub fitting has been used to connect the 4″ copper drain to the cast iron drain line.

How does a drain pipe connect to a vent pipe?

You can see the 2-inch drain pipe leave the box and go into a p-trap. It connects to a 2 x 1.5 x 2 x tee. The vent pipe rising above the tee is just 1.5 pipe and connects to another vent pipe that is coming up from the basement below. That vent pipe leaving the upper right corner of the photo is on its way out through the roof. © 2018 Tim Carter

What kind of fittings are used for cast iron drain pipes?

Most modern cast iron connections are made using rubber or plastic fittings that no longer require heating and melting lead. The illustrations (left) show accessing a cast iron drain cleanout and two methods of emergency, temporary repair of leaks in drain piping.

What causes a leak in a cast iron drain pipe?

Several types of leaks occur in Cast Iron Piping: Improper support leading to movement and separation of pipe joints. Breaks at cast iron pipes or pipe joints due to mechanical impact, movement due to poor support of the cast iron piping, or similar causes.

Our photograph of cast iron drain piping (below left) demonstrates two methods by which connections have been made to newer copper drain lines. At upper left a black plastic hub fitting has been used to connect the 4″ copper drain to the cast iron drain line.

You can see the 2-inch drain pipe leave the box and go into a p-trap. It connects to a 2 x 1.5 x 2 x tee. The vent pipe rising above the tee is just 1.5 pipe and connects to another vent pipe that is coming up from the basement below. That vent pipe leaving the upper right corner of the photo is on its way out through the roof. © 2018 Tim Carter

Most modern cast iron connections are made using rubber or plastic fittings that no longer require heating and melting lead. The illustrations (left) show accessing a cast iron drain cleanout and two methods of emergency, temporary repair of leaks in drain piping.

Several types of leaks occur in Cast Iron Piping: Improper support leading to movement and separation of pipe joints. Breaks at cast iron pipes or pipe joints due to mechanical impact, movement due to poor support of the cast iron piping, or similar causes.