DN15 1/2" Adjustable Float Valve for Water Tank & Hydroponics

DN15 Adjustable Float Ball Valve – Automatic Water Level Control

Keep your water tanks, reservoirs, and hydroponics systems perfectly topped up — automatically. This DN15 (1/2") plastic float valve uses a classic mechanical, electricity-free design to open and close the water supply based on the current water level. When the water drops, the float falls and opens the valve; when the set level is reached, the float rises and shuts it off. Simple, reliable, and zero energy required.

Key Features

• Automatic water level control — opens and closes without any manual intervention or electricity
• 360° adjustable arm — rotate the float arm to your preferred angle for flexible, side-mount installation on any tank wall
• High-quality ABS plastic construction — corrosion-resistant and lightweight for long-lasting use
• Anti-overflow protection — the mechanical shut-off prevents overfilling and water waste
• Wide compatibility — suitable for water tanks, water towers, aquariums, RO systems, livestock troughs, hydroponic reservoirs, and small storage containers
• 1/2" male thread (20mm OD) — standard size for easy fitting on most tanks and pipework

Full Specifications

Where to Use It

This float valve is ideal for a wide range of applications including garden water tanks, hydroponic reservoirs, water towers, aquariums, RO purification systems, and agricultural livestock troughs. Anywhere you need hands-free, consistent water level management, this valve delivers.

Made in Mainland China.

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Frequently Asked Questions

Q: What size thread does this float valve use?

A: The valve features a standard 1/2" (DN15) male thread with a 20mm outer diameter, making it compatible with the majority of household and garden water tanks and pipework.

Q: Does this float valve require electricity to operate?

A: No — this is a fully mechanical, hydraulic float valve. It opens and closes purely based on water level, with no wiring, sensors, or power supply needed. This makes it reliable even during power outages.

Q: Can I adjust the water level it controls?

A: Yes. The 360° adjustable float arm lets you rotate it to different positions during installation, giving you control over the target water level in your tank or reservoir.

Q: Is this valve suitable for hot water systems?

A: This float valve is rated for cold water use only, with a working temperature range of 0–60°C. It is not recommended for hot water or steam applications.

Q: What is the maximum water pressure this valve can handle?

A: The valve is rated for a working pressure of ≤ 0.6 MPa, which covers the vast majority of standard domestic and garden water supply pressures.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.