909 AIR GAP

🚰 Watts 909 Air Gap Drain System (Backflow Protection)

It is a plumbing air gap drain funnel used with backflow prevention assemblies (RPZ devices).

⚙️ What it is

The Watts 909 air gap is a safety drain fitting that:

• Sits beneath a reduced pressure zone (RPZ) backflow preventer
• Provides a physical air break between potable water and drain system
• Directs discharge water safely to a floor drain or drain line

🔧 What it does

It protects drinking water systems by:

• Preventing contaminated water from being siphoned back into clean water lines
• Providing a visible, physical separation (air gap)
• Safely handling:
  • relief valve discharge
  • backflow test water
  • pressure relief events

🧰 Key features

• Designed for Watts 909 / 009 RPZ assemblies
• Built-in funnel or drain receptor
• Usually includes:
  • PVC or cast body
  • drain connection outlet
• Sized to handle full relief discharge flow

🏠 Where it’s used

• Commercial plumbing systems
• Irrigation backflow preventers
• Boiler feed systems
• Any RPZ (Reduced Pressure Zone) installation
• Mechanical rooms