Heater solar water 2






316L Stainless Steel Swimming Pool Solar Collector – high-performance vacuum tube system designed for large-scale swimming pool and commercial water heating projects. Durable, corrosion-resistant, energy-efficient, and low-maintenance, ensuring reliable year-round operation.
Swimming Pool Solar Collector – Riwatt 25-Tube 316L Stainless Steel Non-Pressure Design
| 25 Tubes 316L Stainless Steel Non Pressure Swimming Pool Solar Collector | |||||
| Specification | |||||
| Model | 【GSR-25】 | ||||
| Inner Manifold Material | Marine Grade 316LStainless Steel (Superior anti-rust performance) | ||||
| Outer Shell Material of Manifold | SUS-304-2B stainless steel. | ||||
| Frame | Never rust al.alloy stand frame 1.8mm, 30° Ground Stand | ||||
| Insulation Layer | High-Density PU | ||||
| Tube Dimension | 58*1800mm *【25】 | ||||
| Tube to Tube Distance | 【75MM】 | ||||
| Tube Structure | All-Glass Double Deck Co-Axial Structure | ||||
| Absorb er Area | 【3.325 m2】 | ||||
| Manifold Plumbing Connections | 1 1/4’’ | ||||
| Hailstone Resistance | Diameters of Less Than 25mm (1 inch) | ||||
| Life Span | Approximate to 15~25 Years | ||||
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| Technical Parameters | |||||||||||
| Model | Tube Specification | Absorb er Area | Package Volume | ||||||||
| Diameter | Length | Pieces | (M2) | (M3) | |||||||
| 【VERTICAL TYPE】 | |||||||||||
| GSR-25 | 58mm | 1800mm | 25 | 3.325 | 0.37 | ||||||

The 316L Stainless Steel Swimming Pool Solar Collector operates similarly to a non-pressure solar water heater. It functions as a manifold without a storage tank. The selective coating on the tubes absorbs solar energy and converts it into thermal energy to heat water. Typically used for swimming pool heating and large-scale commercial solar water heating projects, the water circulates continuously between the tank and the collector via a circulation pump.





* Round absorber surface of vacuum tubes passively tracks the sun throughout the day for efficient heat collection.
* Available in 20, 25, and 30-tube models, allowing flexible configurations to meet various project requirements.
* Environmentally friendly with low initial investment and high energy savings.
* Ideal for large-scale solar water heating system installations.
* Low maintenance and long-lasting performance.
*Vacuum Tube:Borosilicate glass 3.3, Φ58×1800mm
*Outer Shell:Stainless steel
*Inner Shell:316L stainless steel
*Insulation Layer:Polyurethane foam
*Support Frame:Corrosion-resistant aluminum alloy
*Suitable for hot climate regions with year-round operation.
* Large-scale solar water heating projects:
* Hotels,
* Cchools,
* Hospitals,
* Factories,
* Apartments,
* Swimming pools, etc.


316L stainless steel is preferred over SUS-304 for swimming pool heating due to its superior corrosion resistance, especially in chlorinated and saltwater environments. Key reasons include:
1. Better Corrosion Resistance: 316L contains molybdenum, making it more resistant to pitting and crevice corrosion than SUS-304, which is vulnerable to rust in pool environments.
2. Longevity: 316L lasts longer, reducing the need for replacements and repairs.
3. Saltwater Resistance: Ideal for saltwater pools, where SUS-304 would corrode more quickly.
4. Lower Maintenance: 316L requires less upkeep due to its durability in harsh conditions.
5. Cost-Effective: Though more expensive initially, 316L saves money over time with fewer repairs and replacements.
In short, 316Lstainless steel solar collectors offers better long-term performance and reliability for swimming pool heating systems.

316L contains molybdenum, which provides superior resistance to chlorine and salt corrosion. It’s ideal for swimming pool heating and coastal environments, ensuring longer lifespan and stable performance.
Perfect for swimming pool heating, hotels, schools, dormitories, and industrial solar hot water systems with medium to large demand.
Typically 0.05~0.1 MPa,that is to say, the solar collector itself only bears the water’s gravity pressure, not any system pressure.
Yes. It can work with existing gas, electric, or heat pump systems—solar energy provides primary heating, and the auxiliary system automatically supports on cloudy days.
The collector uses high-efficiency vacuum tubes or fin-type absorbers with absorption rates over 92%, achieving 50–80% annual energy savings.
316L stainless steel offers excellent anti-corrosion performance. We recommend using softened water and regular maintenance to ensure long-term efficiency.
Almost maintenance-free. A simple annual inspection of system seals and pump operation is usually sufficient.
Yes. The system can be equipped with an electric heater or heat pump backup to ensure continuous hot water supply even without sunlight.
With proper installation and maintenance, 316L stainless steel collectors can last 15–25 years.
Yes. Various sizes, capacities, and connection options are available to match specific project requirements for swimming pools or industrial applications.
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