AstralPool CTX 500C 2HP Pool Pump – Compatible Replacement

The AstralPool Viron XT MkII P320c Variable Speed Pool Pump – Compatible Replacement.

This variable speed pool pump is designed as a direct, plug-in compatible replacement for the AstralPool Viron XT MkII P320c, providing a modern energy efficient upgrade for pools requiring flexible flow control. Conventional single-speed pumps operate at maximum output at all times, consuming unnecessary power during normal filtration. In contrast, this pump uses a three speed DC variable motor to operate efficiently at lower speeds and ramp up only when higher flow is required.

The pump is ideal for pools with spa jets, in floor cleaning systems, solar heating, or other equipment that requires occasional high flow performance. By reducing operating speed during standard filtration cycles, electricity consumption can be reduced by up to 70% per annum, while also lowering carbon emissions and overall running costs.

Ultra-quiet operation is a standout feature, with noise levels as low as 50dBA at one metre. Changing the flow rate reduces motor stress, contributing to longer service life. Built from durable, corrosion resistant engineering grade thermoplastic and manufactured in Australia, the pump is designed to withstand harsh pool environments. Supplied barrel unions suit both 40mm and 50mm PVC pipe connections, allowing for simple replacement without modifying existing plumbing.

Compatibility notice: This is an aftermarket compatible replacement designed to suit AstralPool Viron XT MkII installations. It is not manufactured by or affiliated with AstralPool.

Key Features

• Direct compatible replacement for Viron XT MkII P320c
  Designed for straightforward changeover with no plumbing modifications required.

• Three-speed DC variable motor
  Allows efficient low-speed filtration and high-speed operation when needed.

• Reduce electricity costs by up to 70% p/a
  Lower energy usage during everyday filtration cycles.

• Ultra-quiet operation
  Operates at noise levels as low as 50dBA @ 1 metre.

• Highly adjustable flow rates
  Optimise circulation for filtration, cleaning, heating, or spa operation.

• Ideal for high-flow applications
  Suitable for spa jets and in-floor cleaning systems.

• Australian made and built for local conditions
  Designed for reliability in Australian climates.

• 40mm and 50mm plumbing compatibility
  Supplied barrel unions suit common PVC pipe sizes.

Specifications – Variable Speed (310 Replacement)

Motor & Performance

• Motor Type: Three-speed DC variable motor

• Default Speeds:

  • Low / Eco: 1900 RPM

  • Medium: 2400 RPM

  • High: 2850 RPM

Flow Rate @ 8m Head

• Low / Eco: 140 LPM

• Medium: 215 LPM

• High: 310 LPM

Electrical

• Voltage / Phase: 240V / Single Phase

• Energy Consumption (Amps):

  • Low: 1.49 A

  • Medium: 4.55 A

  • High: 7.1 A

• Energy Consumption (Watts):

  • Low: 205 W

  • Medium: 600 W

  • High: 1000 W

Noise & Efficiency

• Noise Level: As low as 50 dB(A) @ 1 metre

• Energy Rating: 6.0 Star

Plumbing & Construction

• Pipe Connections: 40mm or 50mm PVC

• Maximum Water Temperature: 45°C

• Construction: Engineering-grade thermoplastic, corrosion resistant

• Manufacture: Australia

Dimensions

Installation Guide (Overview)

Installation Guide (Overview)

1. Mount the pump on a stable, well-drained base near pool water level.

2. Ensure adequate clearance around the motor for ventilation.

3. Connect suction and discharge lines using supplied 40mm or 50mm barrel unions.

4. Prime the pump by filling the strainer housing with water before start-up.

5. Connect to a 240V power supply protected by an RCD.

6. Select the appropriate speed setting based on system requirements.

Installation must comply with Australian electrical and plumbing standards.

Maintenance Tips

• Clean the strainer basket regularly to maintain optimal flow.

• Ensure the pump is never run dry to prevent seal damage.

• Keep ventilation areas clear to prevent overheating.

• Use lower speed settings for everyday filtration to extend pump life.

• Maintain balanced pool water chemistry to protect internal components.

Warranty

• 3 years – Pump body and seal plate

• 2 years – Motor

• 12 months – Mechanical seal

Warranty covers defects in materials and workmanship under normal residential use.

What’s in the Box

• 1 × Variable Speed Pool Pump (310 compatible replacement)

• Barrel unions suitable for 40mm and 50mm PVC pipe

• Clear inspection lid with strainer basket fitted

• Installation and operation manual

• Installation and operation manual