• Purchase plumbing and other mechanical supplies with recycled content.
  
• To reduce waste and your costs, only purchase the amount of material needed.
• Ask your vendors to reduce the amount of packaging (pallets, cardboard, plastic shrink wrap metal bands) delivered to the job-site.
• Ask your vendors to take non-recyclable packaging back for reuse.

On-site

• Retain PVC cut-offs for use as stubs for wall drains.
  
• Properly clean joints to prevent leaking.
• Separate and recycle cardboard.
• Separate and recycle plastic, including PVC if possible.
• Make sure recycling bins and waste bills are clearly labelled.
• Measure carefully to avoid end cuts.
• Store materials so that they are not damaged.