🔧 Watts F358553 3/4" 374A Boiler Pressure Relief Valve with Flood Sensor
The Watts F358553 374A Pressure Relief Valve protects hot water space heating boilers from excessive pressure while providing built-in flood monitoring. Its durable iron body with forged bronze inlet and non-metallic disc-to-metal seating ensures long-lasting performance.
This valve comes with a nonrestrictive discharge line flood sensor included, featuring SentryPlus Alert technology to detect excessive water discharges. Activation requires an optional kit to connect to building management systems or the Watts Cellular Gateway.
✅ Key Features
🟢 Protects boilers from excessive pressure (30 PSI relief setting)
🟢 3/4" NPTF female inlet and outlet for standard installation
🟢 Iron body with forged bronze inlet for durability
🟢 Non-metallic disc-to-metal seating ensures leak-free operation
🟢 Supports up to 550,000 BTU/hr
🟢 Flood sensor included with SentryPlus Alert technology
🟢 Sensor activation requires optional kit
📊 Specifications Table
| Specification | Details |
|---|
| Manufacturer |
Watts |
| Part Number |
F358553 |
| Series |
374A |
| Body Material |
Iron |
| Inlet Material |
Forged Bronze |
| Inlet Connection |
3/4" NPTF Female |
| Outlet Connection |
3/4" NPTF Female |
| Pressure Relief Setting |
30 PSI |
| Maximum Working Pressure |
20 PSI |
| Flow Capacity |
550,000 BTU/hr |
| Disc Type |
Non-metallic disc-to-metal seating |
| Flood Sensor |
Included (activation kit sold separately) |
| Lead-Free |
Not in scope |
⚠️ Common Symptoms This Part Fixes
-
Boiler overpressure or exceeding safe limits
-
Relief valve leaks or stuck
-
Excessive water discharge detection required
-
Failed inspection due to missing or malfunctioning safety valve
❓ Frequently Asked Questions (FAQ)
Q: Does the valve include a flood sensor?
A: Yes, the flood sensor is included. Activation requires a separate kit to connect to your building management system or Watts Cellular Gateway.
Q: What is the relief setpoint?
A: The valve is set for 30 PSI to protect your boiler from overpressure.
Q: Can this valve be used with any boiler?
A: Yes, it is suitable for hot water space heating boilers with 3/4" NPTF connections.
Q: Is the valve lead-free?
A: Lead-free compliance is not in scope for this model.
🧭 Shopping Tips
-
Verify 3/4" NPTF connection compatibility with your boiler
-
Confirm 30 PSI relief setpoint meets your system requirements
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Use flood sensor with optional activation kit for real-time water discharge alerts
-
Ideal for both new installations and replacement of existing 374A valves
