The Watts R2402 solenoid valve is a normally closed 2-way brass valve designed for automated water control in reverse osmosis systems and commercial applications requiring precise 120V AC operation. Built with a 0.5-inch NPT connection, this valve provides reliable shutoff when de-energized and instant flow when powered.
SPECIFICATIONS
Watts R2402 Technical Details
| Model Number | Watts R2402 |
| Valve Type | 2-Way Normally Closed (NC) |
| Port Size | 0.5 inch NPT |
| Voltage | 120V AC |
| Body Material | Brass |
| Operating Pressure | 0-150 PSI |
| Flow Direction | Bi-directional |
| Duty Cycle | Continuous |
INSTALLATION & USE
Installing the Watts R2402 Solenoid
- Install the valve in the desired water line using 0.5-inch NPT fittings, ensuring the arrow on the valve body aligns with your preferred flow direction (valve is bi-directional).
- Connect the 120V AC power supply to the solenoid coil terminals, ensuring all electrical connections comply with local codes and the power source is properly grounded.
- Test operation by energizing the valve and confirming water flow, then de-energizing to verify complete shutoff with no leakage.
- Mount the valve in an accessible location for future maintenance, avoiding positions where the solenoid coil will be submerged or exposed to excessive moisture.
COMPATIBILITY
Application Range
The Watts R2402 solenoid valve integrates with residential and commercial reverse osmosis systems, water treatment equipment, ice makers, humidifiers, and automated irrigation controls. Compatible with potable water applications and suitable for system automation where normally closed operation is required. Works with standard 120V control systems including timers, float switches, and RO tank pressure switches.
🔧 Pro Tip: Always install a manual ball valve upstream of the solenoid for maintenance isolation. The normally closed design means the valve remains shut during power loss, making it ideal for RO systems where you need automatic shutoff when the storage tank is full.
