RUNXIN F71B1 Automatic Filter Valve 2.5″ Base
R2 278,00 Incl. VAT
The Runxin F71B1 is a programmable automatic filter valve that automates backwash and rinse cycles for media filters. It fits standard top-mount vessels with ¾″ connections, supports time or flow settings, and includes an LED status display.
Runxin F71B1 Automatic Filter Valve
The Runxin F71B1 automatic filter valve is a top-mount control head designed to automate cleaning cycles on sand, activated carbon, and other media filtration systems. Replacing manual multiport valves, it sequences service → backwash → fast rinse → service based on either programmed time intervals or flow (meter) triggers.
An integrated LED display shows operational status and mode, while the controller retains programmed parameters after power outages. A button-lock feature prevents accidental setting changes, and manual rinse initiation is available directly from the interface.
The F71B1 is ideal for residential and small commercial filtration applications where automated backwash improves water quality consistency and reduces maintenance demands.
📐 Filter Tank Sizing Guide
Proper tank sizing ensures effective backwashing and filtration performance.
| Tank Diameter | Typical Use |
| 6″ | Small residential filtration |
| 8″ | Standard home filtration systems |
| 10″ | Higher capacity residential setups |
Sizing Notes
- Larger diameter tanks hold more media and may need less frequent backwash.
- Ensure your selected tank is compatible with the 2.5″-8 NPSM base and riser pipe size.
🕒 Backwash Timing Recommendations
The F71B1 can be programmed to backwash based on either time or volume.
Time-Based Backwash
| Water Quality/Use | Suggested Interval |
| Light sediment | Every 2–3 days |
| Moderate sediment | Every 1–2 days |
| High sediment load | Daily or shorter intervals |
Flow/Volume Backwash (Meter Type)
| Water Volume | Backwash Trigger |
| Low daily use | ~3000–5000 L |
| Moderate daily use | ~2000–4000 L |
| High daily use | ~1500–3000 L |
Notes
- Use meter control when water usage fluctuates daily.
- Time scheduling is simpler when usage is regular.
📌 Practical Installation Advice
- Confirm vessel compatibility — ensure the tank head fits the 2.5″-8NPSM mounting base.
- Program settings — select either timer or meter mode based on usage.
- Check media type — glass or carbon filters work well with this valve.
- Monitor first cycles — adjust backwash frequency for water quality results.
| Weight | 3 kg |
|---|
Specifications
Specification |
Details |
| Model | Runxin F71B1 |
| Product Type | Automatic filter control valve |
| Control Type | Time clock or meter (flow) based backwash |
| Mount Type | Top-mount filter vessel |
| Inlet Size | ¾″ male thread |
| Outlet Size | ¾″ male thread |
| Drain Port | ¾″ male thread |
| Rated Flow Capacity | Up to 2 m³/h (2000 L/h) |
| Applicable Tank Diameter | 6″–10″ |
| Operating Pressure | 0.15 – 0.6 MPa |
| Water Temperature | 5 °C – 50 °C |
| Water Turbidity Limit | < 20 FTU |
| Power Supply | AC100–240 V / 50–60 Hz → DC 12 V / 1.5 A |
| Mounting Base Size | 2.5″-8 NPSM |
| Riser Pipe OD | 1.05″ (≈ 26.7 mm) |
| Display | LED status display |
| Manual Function | Manual backwash via control panel |
| Typical Media | Glass, activated carbon, quartz sand |
| Typical Applications | Household or small commercial filtration systems |
Pros & Cons
✔ Pros
- Automates backwash and rinse cycles to maintain filter performance.
- Dual control options: timer or flow (meter) based settings.
- LED status display with memory retention after outages.
- Manual rinse initiation from controller.
- Compact design for standard residential filter vessels.
✖ Cons
- Moderate flow capacity (up to ~2 m³/h) — not suitable for large commercial systems.
- Requires a 12 V DC power adaptor.
- Programming interface may require setup familiarity for first-time users.
FAQ's
1: What does the Runxin F71B1 automatic filter valve do?
It automates the backwash and rinse cycles for glass and carbon filter vessels to maintain media cleanliness without manual operation.
2: Can it be used with both sand and carbon filters?
Yes — the F71B1 is compatible with a range of filter media including glass, activated carbon, and similar granular media.
3: How is backwash triggered?
You can choose timer-based scheduling or flow (meter) based triggers depending on system needs.
4: Does it retain settings after a power outage?
Yes — the controller retains programmed settings even after a power interruption.
5: What size tank does it fit?
It supports filter tanks with diameters from 6″ to 10″.
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