Watts 8-M115FBB1A1B0H-0 Pressure Reducing Valve, Ductile Iron, Flanged

The Watts 8-M115FBB1A1B0H-0 is a 8" globe-pattern pilot-operated pressure reducing control valve with Flanged connections. It features a ductile iron body. Rated to 175 psi.

This Watts 8 inch, globe pattern, class 150 flanged, fire pressure reducing control valve is designed to automatically reduce a fluctuating higher inlet pressure to a constant lower downstream pressure regardless of varying flow rates. The quick closing action of the valve prevents possible damaging high inlet pressure from passing through the valve to downstream piping. This valve is UL listed for a 50-165 psi reduced pressure adjustment range. This valve includes epoxy coated ductile iron and xylan coated stainless steel stem and seat ring.

Features

• Globe pattern
• Outlet pressure adjustment range is 50 to 165 psi
• Convenient Class 150 flanges
• Coated stem and seat ring for longer life in harsh water conditions

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: Pressure Regulator
• Size: 8"
• Inlet Size: 8"
• Outlet Size: 8"
• 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: 8-M115FBB1A1B0H-0
• Lead-Free: No
• Item Type: Valve
• Control Function: Pressure Reducing
• Valve Platform: Mustang (M-Series)
• Body Pattern: Globe
• End Connection / Pressure Class: 150# Flanged
• Coating: Fusion-Bonded Epoxy
• UL Listed / FM Approved: Yes