Homeowner checklist

Plumbing vents and AAVs: protecting the water in the trap

Use these steps to plan, check and keep a record of your next actions.

• Have recurring drain or odour symptoms assessed before changing vents.
• Ask how each trap seal is protected in the proposed system.
• Confirm any AAV is approved for the application under local rules.
• Ask where positive pressure is relieved outdoors.
• Ensure service access and air admission remain available after finishing.

Notes & questions to follow up