What is the AstralPool Clear Series Non-Return Valve Used For?
The AstralPool Clear Series non-return valve combines flow efficiency, easy maintenance, and maximum durability for swimming pool installations. Designed to allow water flow in one direction whilst preventing backflow, this model stands out due to its completely transparent body and lid, offering 360° visibility of the flow rate and internal system operation.
Thanks to its full-bore flap design, it ensures an unobstructed water passage with minimal pressure drop, thereby optimising filtration performance. Manufactured in robust PVC-U with a corrosion-resistant coated spring, it is 100% compatible with salt chlorination systems and seawater pools.
Key Advantages
- 360° Total Visibility: The transparent body and lid act as an integrated sight glass in real time, allowing you to instantly inspect water clarity and check the flap position from any angle.
- Full-Flow Design & Minimal Head Loss: The full-bore flap opens with minimal pressure, preventing unnecessary hydraulic friction across your pipework.
- Quick, Tool-Free Maintenance: The threaded top lid can be unscrewed by hand, and union ends allow easy access to internal components without disturbing the surrounding installation.
- High Chemical & Mechanical Resistance: Built from durable PVC-U with a specially treated anti-corrosion spring. Fully suitable for salt water chlorinators and marine applications.
- Flexible Installation: Designed to fit various pipework layouts (suitable for horizontal or vertical fitting depending on the model).
Technical Specifications
| FEATURE | TECHNICAL SPECIFICATION |
|---|---|
| Maximum Operating Pressure | 3.5 bar (50 psi) |
| Operating Temperature Range | 10 °C to 30 °C |
| Body & Component Material | High mechanical and chemical resistance PVC-U |
| Spring Protection (spring models only) | Coated spring with anti-oxidation treatment |
| Chemical Compatibility | 100% suitable for Salt Chlorinators and Seawater |
| Positioning Options | Horizontal or Vertical installation (depends on spring/springless version) |
| Lid Maintenance | Hand-threaded lid removable without tools |
• SPRINGLESS Valves: Must be installed in a vertical position with upward water flow to ensure gravity properly seals the flap.
• SPRING-LOADED Valves: Can be installed in both vertical and horizontal positions. For horizontal pipe runs, always use the spring-loaded model to guarantee a tight seal when the pump stops.
Frequently Asked Questions (FAQ)
How do I know whether to choose the spring-loaded or springless version?
If you are installing the check valve on a horizontal pipe run, you must choose the spring-loaded version to ensure the flap closes securely when water flow ceases. If installing vertically with an upward flow (bottom to top), you can select the springless version, as gravity and fluid weight will assist in sealing the valve shut.
Can I use the Clear Series valve in a salt water pool?
Yes. The valve is fully manufactured from high-grade PVC-U, and the internal spring (on spring-loaded models) features a special protective coating against oxidation, making it 100% suitable for salt electrolyser systems and seawater pools.
Do I need any tools to service the valve’s internal parts?
No. The top threaded lid is designed for easy manual removal without tools. This allows quick access to the internal flap or seals for cleaning or replacement without cutting or dismantling the existing pipework.
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