Outback AirGuard AV0025 25mm Solar Pump Vacuum Release Air Valve

The Outback AV0025 Vacuum & Air Release Valve is a heavy-duty 25mm automatic air valve designed to protect solar bore pump and water transfer systems from air locks, vacuum conditions, and damaging pressure surges. It automatically releases trapped air during system filling and admits air during drainage or pump shutdown, preventing pipe collapse and hydraulic shock.

Air management is critical in long pipe runs, elevation changes, and pressurised solar pump systems — particularly where reliability and unattended operation are required.

How the Valve Works

The AV0025 performs two critical functions:

• Air Release (during filling):
  Expels large volumes of trapped air as the pipeline fills, allowing smooth priming and stable flow.
• Vacuum Relief (during shutdown or drainage):
  Admits air rapidly when negative pressure occurs, preventing pipe deformation, joint failure, or system collapse.

This dual-action design optimises hydraulic efficiency and protects downstream components such as pressure tanks, filters, valves, and controllers

Why This Matters in Solar Pump Systems

Solar pumps often operate with:

• Long delivery lines
• Variable flow rates
• Frequent start/stop cycles

Without proper air relief, systems can suffer from:

• Air locking
• Inconsistent flow
• Pipe damage
• Increased wear on pumps and fittings

The AV0025 eliminates these risks by maintaining correct air balance throughout operation.

Key Benefits

• Automatic air release & vacuum relief
• Prevents air locks and pipe collapse
• Improves system priming and flow stability
• Heavy-duty polypropylene construction
• Low-maintenance, non-corrosive design
• Ideal for solar bore & transfer pump systems

Construction & Materials

• Body & Cover: Polypropylene (corrosion & chemical resistant)
• Internal Components: Reinforced polymer float assembly
• Seals: EPDM / Buna-N (application dependent)
• Connection: 25mm BSP male threaded

Technical Overview

• Model: AV0025
• Connection Size: 25mm BSP
• Valve Type: Vacuum & air release (combination)
• Maximum Working Pressure: 8 bar
• Maximum Temperature: 60 °C
• Application: Solar bore pumps, transfer lines, pressure systems

Product Download

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