Nibco h-41405whv 1-1/4 in Pump Isolation Valve

Product Description

The NIBCO h-41405whv is a 1-1/4 inch threaded pump isolation valve featuring a rotating flange design, built for hydronic and plumbing systems where inline circulators and pumps require periodic service or replacement. The rotating flange allows technicians to align bolt patterns without rotating the valve body, simplifying installation and future pump removal. Constructed to lead-free standards, this valve meets potable water compliance requirements where applicable. It is intended for professional installation by licensed plumbers and HVAC technicians working on closed-loop heating systems, domestic water systems, and similar hydronic applications.

This pump isolation valve is well suited for residential and light commercial hydronic heating installations where a circulator pump must be isolated from the system for maintenance, replacement, or seasonal servicing. The threaded end connection is compatible with standard NPT pipe fittings at the 1-1/4 inch pipe size. The rotating flange feature reduces alignment frustration during pump changeouts, making it a practical choice for service technicians who perform recurring pump replacements.

Key Features

• 1-1/4 inch threaded (NPT) end connection for standard pipe compatibility
• Rotating flange design allows bolt-hole alignment without repositioning the valve body
• Lead-free construction meets potable water compliance standards
• Pump isolation function enables circulator removal without draining the system
• Designed for hydronic heating, domestic water, and closed-loop plumbing applications

Compatibility

Designed as an OEM-style replacement or new-installation pump isolation valve for 1-1/4 inch threaded circulator pump connections in residential and light commercial hydronic systems.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician. Shut off and depressurize the system and allow it to cool before removing or installing any isolation valve. Use appropriate thread sealant or tape rated for the service fluid and temperature. Verify flange bolt pattern alignment with the circulator pump prior to final tightening.

Technical Specifications

• Connection Size: 1-1/4 inches
• Connection Type: Threaded (NPT)
• Flange Type: Rotating flange
• Lead Free: Yes

Standard Information

• Brand: NIBCO
• Manufacturer Part Number: h-41405whv