Cast Iron Drain Pipe
Cast Iron Drain Pipe - Quiet, Durable, and Wonderful
"At the very least, use cast iron drain pipe for your toilet pipes across ceilings and down walls. This will stop embarrassing noise and add value to your home."
Tim Carter | Founder - AsktheBuilder.com
Modern cast iron drain pipe is nothing like the cast iron pipe poured into molds years ago. The wall thickness is consistent and the cast iron can last hundreds of years.
It's important to realize that you don't have to use it for all the pipes in your home. Toilet stacks that make noise are the first place to use cast iron.
All vent pipes in your home can be normal cellular PVC pipe to save money. Vent pipes just have air move through them.
You can also use PVC for the horizontal branch arms that extend left or right of a vertical stack for any common sink. Look at this photo of branch arm and WATCH the video below to see a video of several branch arms serving sinks:
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How Do You Connect the Pipes and Fittings?
You use no-hub stainless-steel couplings that contain a rubber seal and a massive stainless-steel outer band. Two ring clamps squeeze the rubber against the cast iron to create a leak-proof connection. The couplings allow you to make adjustments for perfect alignment.
Here are some of these couplings in this photo. I installed all this cast iron in my daughter's new home in the winter of 2019.
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Does Cast Iron Pipe Pass Code?
Yes, the cast iron pipe is code compliant. It's used exclusively in large high-rise and institutional buildings because it's durable and fireproof.
Does Cast Iron Pipe Burn?
No. Cast iron pipe will not burn. Burning PVC plastic pipe creates toxic smoke and gas that can kill you in seconds should you breathe in the fumes.
Why is Cast Iron Quiet?
Cast iron pipe is much denser than PVC. The water crashing down a vertical stack doesn't have enough energy to make cast iron vibrate. However, PVC will vibrate readily like a bass drum in your walls and ceilings.