💧 2-40-000421 FULTON LOW WATER SAFETY RELAY
🧭 Product Overview
The Fulton 2-40-000421 Low Water Safety Relay is a critical safety device designed to protect boilers and water heaters by interrupting the system in low-water conditions. It ensures safe operation by preventing the heating system from running without sufficient water, which could cause damage or hazards.
⚠️ Notes
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Type: Low-Water Safety Relay
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Pins: 10-pin
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Voltage: 120 VAC
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Frequency: 50/60 Hz
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Current Rating: 10 Amp
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Load: 120/240 VAC @ 1/3 HP
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Power Consumption: 1.5 VA
⚙️ Key Features
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✅ Ensures safe operation of boilers and water heaters
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✅ Protects against low-water conditions that could damage equipment
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⚡ 10-pin connection for easy integration into existing systems
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🔌 Standard 120 VAC operation with a 10 Amp rating
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🛠️ Compact and durable for reliable long-term use
⚙️ Technical Specifications
| Specification | Details |
| Manufacturer |
Fulton |
| Model |
2-40-000421 |
| Type |
Low-Water Safety Relay |
| Voltage |
120 VAC |
| Current |
10 Amp |
| Frequency |
50/60 Hz |
| Pins |
10-pin |
| Load |
120/240 VAC @ 1/3 HP |
| Power Consumption |
1.5 VA |
⚠️ Common Symptoms / When to Replace
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🔄 Boiler or heater fails to start despite normal conditions
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⚠️ Relay does not trip during low-water conditions
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🛠️ Frequent system lockouts
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💧 Water level alarms ignored or not functioning
❓ Frequently Asked Questions (FAQ)
Q: What is the purpose of this relay?
A: It protects boilers and water heaters by shutting off the system when water levels are too low.
Q: Is it compatible with all Fulton boilers?
A: ✅ Compatible with most Fulton low-water cutoff and safety systems; always check your model specifications.
Q: What type of load can it handle?
A: Rated for 120/240 VAC up to 1/3 HP.
Q: How is it powered?
A: Standard 120 VAC supply, consuming only 1.5 VA.
🛒 Shopping Tips
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✅ Confirm your system requires a 10-pin low water relay
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⚡ Ensure voltage and load ratings match your equipment
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🛠️ Check compatibility with your boiler or water heater model