Pipe Dreams: Alternatives to PVC Plumbing Pipes

Alternatives to PVC


| September/October 2004


Many houses are built with PVC pipes because they’re light, durable, and cheap. Unfortunately, from manufacturing to disposal, PVC poses problems: It produces carcinogens and dioxins, releases deadly hydrogen chloride gas if there’s a fire, and is seldom recycled.

Should you build with PVC-free pipes or replace existing PVC plumbing? Green builder Doug Parker, owner of Bighorn Builders in Boulder, Colorado, sheds some light.

1. Distinguish between water supply lines and drain or wastewater venting. Of greatest concern are supply pipes; there’s evidence that PVC manufactured before 1977 can leach vinyl chloride into water. (Newer pipes may be less hazardous.) There aren’t immediate health problems—just environmental ones—with using PVC for drain pipes.

2. Prioritize. To take steps in the right direction, install PVC alternatives in supply lines.



If you want to go all the way, replace the plumbing pipes as well.

The Alternatives

COPPER

Pros:
• Is a stable material for supply lines, especially in drier climates. (Note: Use lead-free solder.)
• Is recyclable after house demolition.

Cons: 
• Potentially causes high levels of copper in water.
• Expensive, especially for large waste and vent pipes.
• Copper mining harms the planet.

CAST IRON 








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