3/4″ DC 12V Normally Closed Solenoid Valve for Water

This 3/4 inch DC 12V Normally Closed (NC) Solenoid Valve is designed to automatically control water flow in irrigation, smart home plumbing, tanks, fountains, and automation systems. In the normally closed state, the valve stays shut with no power. When 12V DC is applied, it energizes and opens to allow water to pass—ideal for safe water control and leak prevention setups.

Key Features

• Valve Size: 3/4″ (pipe thread)

• Voltage: 12V DC

• Type: Normally Closed (NC) – closed when power is OFF

• Suitable for water control systems and automation projects

• Fast ON/OFF switching with stable operation

• Durable body for long-term use (model dependent)

• Easy integration with relay modules / MOSFET drivers / controllers

Full Specifications (Typical)

Mechanical

• Port Size: 3/4″ inlet/outlet

• Valve Type: 2-way (ON/OFF)

• Operating Mode: Normally Closed

• Fluid: Clean water (not recommended for corrosive liquids)

Electrical

• Coil Voltage: 12V DC

• Control: ON/OFF (use relay or MOSFET driver)

• Duty Cycle: Use within rated working time (some models are not designed for continuous 24/7 coil power—depends on coil type)

Installation Notes

• Ensure flow direction follows the arrow on the valve body (if present)

• Use thread seal tape for leak-free installation

• Add a filter before the valve to protect from sand/rust particles

• Keep wiring secure and dry; use a suitable power supply

Applications

• Smart irrigation systems

• Automatic water tank filling control

• Water dispensers and fountains

• Smart home leak protection shutoff systems

• Agriculture watering lines

• DIY water automation projects

Used In

• Arduino / ESP32 smart valve controllers

• Timer-based irrigation controllers

• Float sensor + solenoid valve tank filling systems

• Home Assistant automation (with relay board)

Package Includes

• 1× 3/4″ DC 12V Normally Closed Solenoid Valve