Plastic One-Way Inline Check Valve 4–12mm | Fuel Gas Water
Plastic One-Way Inline Check Valve 4–12mm | Fuel Gas Water
White Plastic One-Way Inline Check Valve — 4mm / 6mm / 8mm / 10mm / 12mm
Keep your fluid systems flowing in the right direction with this compact, reliable one-way inline check valve. Designed for low-pressure hose lines, it automatically blocks reverse flow while allowing forward flow with a minimal cracking pressure of just >0.015 MPA. Whether you're working on a fuel line, water circuit, aquarium, irrigation setup, or small engine system, this valve delivers consistent, hands-free flow control in a lightweight plastic body.
Key Features
- Multiple size options: Available in 4mm, 6mm, 8mm, 10mm, and 12mm hose fittings — choose the size that matches your tubing
- Durable plastic construction with a silicone valve core (10mm variant) — withstands temperatures up to 160°C
- Acid, oil & ozone resistant — ideal for demanding environments
- Broad fluid compatibility: Suitable for water, petrol, diesel, oils, and other common liquids and gases
- Low opening pressure: Activates at >0.015 MPA for smooth, dependable one-directional flow
- Compact inline design — easy to install directly into existing hose runs with no tools required
- Brand new condition: 100% new, unused valve included per pack
Specifications
| Color | White |
| Material | Plastic body, silicone valve core |
| Available Hose Sizes | 4mm, 6mm, 8mm, 10mm, 12mm |
| Opening Pressure | >0.015 MPA |
| Max Temperature (10mm) | 160°C |
| Total Length (10mm) | 58mm |
| Fluid Compatibility | Water, petrol, diesel, oils, gas, and other fluids |
| Pressure Rating | Low pressure |
| Country of Origin | Made in China |
What's in the Box
- 1 x One-Way Inline Check Valve (in your selected size)
Note: Please allow 3–5 mm tolerance due to manual measurement.
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Frequently Asked Questions
Q: What hose sizes does this one-way check valve fit?
A: This inline check valve is available in five sizes: 4mm, 6mm, 8mm, 10mm, and 12mm. Simply choose the size that matches your existing hose or tubing inner diameter for a secure, leak-free fit.
Q: What types of fluids is this plastic check valve compatible with?
A: The valve is compatible with a wide range of liquids and gases, including water, petrol, diesel, oils, and other common fluids. Its acid, oil, and ozone-resistant construction makes it suitable for demanding plumbing, fuel, and irrigation applications.
Q: How does a one-way inline check valve work?
A: A one-way check valve allows fluid or gas to flow in only one direction. When forward pressure exceeds the opening pressure (>0.015 MPA), the valve opens automatically. If flow reverses or pressure drops, the valve closes to prevent backflow — no manual operation needed.
Q: Is this valve easy to install?
A: Yes. The inline design means you simply cut into your existing hose line and push each end of the valve onto the hose. No special tools are required, and the compact form factor makes it suitable for tight spaces in plumbing, automotive, aquarium, and garden applications.