Watts 1116FM 150 6 Relief Valve, Ductile Iron, Flanged

The Watts 1116FM 150 6 is a 6" angle-pattern pilot-operated pressure relief / sustaining / backpressure control valve with Flanged connections. It features a ductile iron body. Rated to 175 psi.

This 6" angle pattern single chamber relief valve automatically maintains a constant pressure in a fire protection system by relieving excess pressure. It is designed for accurate control and dependable performance, meeting all requirements for UL listed, FM Approved fire protection service. The relief service is at 175 psi, the flanged end connections are ANSI 150. SentryPlus Alert® technology provides intelligent pressure monitoring and notifications using integrated sensors, and integrates with the Sensor Control Monitor to deliver maintenance alerts through BAS via RS-485 Modbus or the Nexa® platform over Wi-Fi.

Features

• Maintains a constant pressure in the fire protection system by relieving excess pressure
• Body and cover are constructed of strong and durable ductile iron
• ANSI 150 flange
• Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa platform by Wi-Fi connectivity
• Relief at 175 psi

Common Questions

What is the maximum working pressure?

This unit is built as 150# Flanged and is rated to 175 psi. End connection sets the ceiling on this platform, and 150# and 300# bodies are not interchangeable — confirm the class matches your flange drilling before ordering.

Is this valve UL Listed and FM Approved for fire protection?

Yes — this model carries the UL listing and FM approval required for fire-protection service. Non-listed control valves cannot be substituted on a fire job even when the body and pilot are otherwise identical.

Specifications

• Type: Relief
• Size: 6"
• Inlet Size: 6"
• Outlet Size: 6"
• Connection: Flanged
• Body Material: Ductile Iron
• Pressure Class: Class 150
• Max Pressure (psi): 175
• Application: Fire Protection
• Operation: Pilot-Operated Diaphragm
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: 1116FM 150 6
• Lead-Free: No
• Item Type: Valve
• Control Function: Pressure Relief / Sustaining / Backpressure
• Body Pattern: Angle
• End Connection / Pressure Class: 150# Flanged
• Coating: Fusion-Bonded Epoxy
• UL Listed / FM Approved: Yes