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Help Center20-40m³/h FRP Swimming Pool Sand Filter 2.5 Bar Working Pressure for Above Ground Pools
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Founded in 1998, Anping County Boli Hardware Wiremesh Products Factory has been a dedicated manufacturer of filtration solutions for over two decades. Our 20-40m³/h FRP Swimming Pool Sand Filter is engineered to deliver reliable, high-performance filtration for above ground pools. Combining corrosion-resistant fiberglass construction with a robust 2.5 Bar working pressure, this filter ensures crystal-clear water while minimizing maintenance efforts. Discover how our years of expertise in the wire mesh and filtration industry translate into a product that stands the test of time.
Key Features & Technical Specifications
- Superior FRP Tank Construction: Made from high-grade fiberglass reinforced plastic, our filter tank resists rust, corrosion, and UV damage — ideal for outdoor above ground pools.
- High Flow Rate (20-40 m³/h): Handles water circulation efficiently for medium to large above ground pools, reducing turnaround time.
- Safe Working Pressure of 2.5 Bar: Designed to withstand standard pump pressures, providing consistent filtration without risk of bursting.
- Easy Installation & Maintenance: Lightweight design simplifies setup; top-mounted multi-port valve allows quick backwashing and rinsing.
- Versatile Compatibility: Works with most above ground pool pump systems (e.g., 1.5-2 HP pumps) and accepts standard silica sand filter media.
- Long Service Life: FRP material resists cracking and fading, offering years of dependable service even in harsh weather conditions.
Technical Parameters
| Parameter | Value |
|---|---|
| Model | BL-SF20-40 |
| Max Flow Rate | 40 m³/h |
| Recommended Flow Rate | 20-30 m³/h |
| Working Pressure | 2.5 Bar (36 psi) |
| Test Pressure | 4.0 Bar |
| Filter Media | #20 silica sand (0.5-0.8 mm) – 150-200 kg |
| Connection Size | 2" (50 mm) – optional 1.5" adapter |
| Valve Type | Push-Pull or Multi-Port (optional) |
| Weight (empty) | Approx. 25-35 kg |
How It Works & Customer Benefits
The sand filter uses a simple yet effective mechanism: water enters the tank, passes through a bed of sand which traps particles as small as 20-40 microns, and returns clean to the pool. The 2.5 Bar pressure rating ensures strong flow even when the filter begins to collect debris, maintaining efficient circulation. For above ground pool owners, the lightweight FRP construction means the filter can be easily moved and installed without heavy equipment. Additionally, the tank’s smooth interior reduces friction, allowing the pump to work more efficiently — saving energy and extending pump life.
Our filter is designed with user-friendly maintenance in mind. Backwashing the sand bed is quick — simply turn the valve to “backwash” for 2-3 minutes, then rinse. This process flushes out trapped dirt and restores filtration performance. With proper care, the sand media only needs replacement every 3-5 years, making this a low-cost, low-hassle solution for pool owners.
Trust & Why Choose Us
As a factory established in 1998, Anping County Boli Hardware Wiremesh Products Factory has accumulated over 25 years of manufacturing experience. We export annually valued at US$5-10 million to markets across North America, South America, Europe, Southeast Asia, Africa, and Oceania. Our products are trusted by distributors and pool professionals worldwide. We ship from major Chinese ports including Tianjin, Qingdao, Shanghai, and Foshan, ensuring timely delivery. Each sand filter undergoes rigorous pressure testing before leaving our facility. We are committed to providing reliable filtration solutions backed by decades of engineering know-how. Contact us today to discuss your order or request a sample — we are ready to support your pool filtration needs with competitive pricing and professional service.
Frequently Asked Questions
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Q: What size pool is this filter suitable for?
A: A 20-40 m³/h flow rate is ideal for above ground pools with a volume of 30-60 m³ (approximately 8,000-16,000 gallons). For larger pools, you may consider multiple units or a higher flow model. -
Q: What type of sand should I use?
A: We recommend #20 silica sand (0.5-0.8 mm grain size). The required quantity depends on tank diameter, typically 150-200 kg. Do not use play sand or fine sand as it may clog the underdrain. -
Q: Can I use this filter with a saltwater pool?
A: Yes, the FRP tank is corrosion-resistant and suitable for saltwater systems. However, we recommend using a compatible multi-port valve with corrosion-resistant internals (available upon request). -
Q: How often do I need to backwash?
A: Backwash when the pressure gauge rises 8-10 psi above the clean starting pressure. Depending on pool usage, this may be every 1-2 weeks. Regular backwashing maintains optimal flow. -
Q: What is the maximum pump horsepower I can use?
A: The filter is rated for 2.5 Bar working pressure. For above ground pools, pumps up to 2 HP (if properly sized) are generally safe. Always check the pump’s max pressure to avoid exceeding the filter’s rating. -
Q: Is the filter easy to install?
A: Yes. The tank comes with a pre-installed bulkhead fitting. You need to connect the pump outlet to the filter inlet, and the filter outlet to the pool return. A multi-port valve simplifies connections. Detailed installation instructions are provided. -
Q: Do you offer custom colors or valve configurations?
A: Yes, we offer customizable colors (e.g., blue, green, gray) and valve types (push-pull or multi-port). Please contact us with your requirements. -
Q: What is the warranty period?
A: We provide a standard 1-year warranty against manufacturing defects. Extended warranty options are available for bulk orders. Please inquire for details.
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