NIBCO N001266 SI-8 1/2 in Brass Full Port Gate Valve QT763X

NIBCO N001266 SI-8 1/2" Brass Full Port Gate Valve with Solder Ends Brand: NIBCO SKU: N001266 Product Overview The NIBCO N001266 SI-8 is a 1/2" brass full port gate valve with solder ends for compatible copper tube systems. Designed for full open or full closed service, this valve features a non-rising stem, standard handwheel, solid wedge, integral seats, and bi-directional service. It is a practical shutoff valve for irrigation, light commercial, residential, mechanical, and general service applications where a solder-end brass gate valve is required. Key Features: 1/2" Valve Size: Designed for compatible 1/2" copper tube systems. Brass Gate Valve: Brass body construction supports dependable service in compatible systems. Full Port Design: Full port flow path helps reduce restriction when the valve is fully open. Solder End Connections: Female solder cup ends allow sweat connection to compatible copper tubing. Non-Rising Stem: Stem design allows operation without the handle rising significantly above the valve. Standard Handwheel: Handwheel operation provides controlled opening and closing. Solid Wedge: Solid wedge gate design supports positive shutoff when used within the valve’s intended service conditions. Integral Seats: Integral seat design supports reliable sealing performance. Bi-Directional Service: Valve can be used for flow in either direction when installed correctly. 200 PSI Cold Working Pressure: Distributor specifications list the N001266 at 200 PSI cold working pressure. Irrigation Service Use: NIBCO notes the SI-8 design is a good choice for irrigation services. 2-Year Limited Warranty: NIBCO lists the SI-8 series as backed by a 2-year limited warranty. Technical Specifications: Model: SI-8 Material Number: N001266 Product Type: Gate Valve Brand: NIBCO Valve Size: 1/2" Body Material: Brass Port Type: Full port Connection Type: Female solder cup / solder ends Valve Operator: Standard handwheel Stem Design: Non-rising stem Wedge Type: Solid wedge Seat Type: Integral seats Service Direction: Bi-directional service Cold Working Pressure: 200 PSI listed by distributor specifications Application Note: NIBCO describes the SI-8 as a good choice for irrigation services Warranty: NIBCO 2-year limited warranty listed for the SI-8 series Potable Water Note: Distributor information for SI-8 notes use in U.S. drinking water applications is prohibited after January 3, 2014; confirm current approvals and code requirements before potable use Package Includes: NIBCO N001266 SI-8 Gate Valve: 1/2" brass full port gate valve with solder end connections. Standard Handwheel: Handwheel operator for opening and closing the valve. Installation Supplies Not Included: Copper tube, solder, flux, fittings, pipe supports, insulation, tools, and code-required accessories are sold separately. Applications: Irrigation Systems: NIBCO notes the solid wedge, integral seats, and bi-directional service make the SI-8 a good choice for irrigation services. Residential Plumbing: Shutoff service for compatible residential copper piping systems where code and product approvals allow. Light Commercial Systems: General isolation valve for compatible light commercial water or mechanical piping applications. Mechanical Piping: Useful for compatible hydronic, service, and equipment isolation applications where a solder-end brass gate valve is specified. Service Isolation: Helps isolate piping branches, equipment, or system sections for maintenance and repair. Copper Tube Installations: Designed for solder connection to compatible copper tubing. Installation & Use Notes: Confirm Application: Verify valve size, pressure rating, temperature rating, fluid compatibility, and local code requirements before installation. Solder Connection: This valve uses female solder cup ends. Install using proper soldering practices for copper tube systems. Protect Valve Components: Avoid overheating the valve during soldering. Excess heat can damage internal sealing surfaces or packing materials. Full Open or Full Closed Use: Gate valves are generally intended for isolation service, not throttling. Use fully open or fully closed whenever possible. Handwheel Operation: Open and close using the standard handwheel. Do not force the handwheel beyond its normal stop or use cheater bars. Non-Rising Stem: The stem does not rise significantly during operation, making it useful where vertical clearance is limited. System Pressure: Depressurize and drain the line before installation, removal, repair, or solder work. Flow Direction: NIBCO describes the SI-8 as suitable for bi-directional service, but the valve should still be installed according to project specifications and best practices. Potable Water Warning: Confirm current lead-free and potable water approvals before using this valve in potable drinking water applications. Leak Testing: After installation, pressure test the system as required and inspect solder joints, packing, and valve body for leaks. Professional Installation: Plumbing, irrigation, and mechanical valve installations should be performed by a qualified professional when code, pressure, soldering, or system compatibility is unclear. Frequently Asked Questions What is the NIBCO N001266? The NIBCO N001266 is a 1/2" SI-8 brass full port gate valve with solder end connections. Is this the same as QT763X? No. QT763X is a NIBCO quarter-turn low pressure sillcock. The N001266 material number and SI-8 link point to a brass solder-end gate valve. What size is this valve? Distributor specifications identify N001266 as the 1/2" SI-8 gate valve. What connection type does it use? The SI-8 series uses solder end connections, also described by NIBCO as female solder cup connections. Is this a full port valve? Yes. NIBCO identifies the SI-8 as a brass full port gate valve with solder ends. What type of operator does it have? The SI-8 uses a standard handwheel operator. Does it have a rising stem? No. Distributor specifications identify the N001266 as having a non-rising stem. What is the pressure rating? Distributor specifications list the N001266 with 200 PSI cold working pressure. Can this valve be used for throttling? Gate valves are generally intended for isolation service. Use the valve fully open or fully closed rather than partially open for throttling. Is this valve suitable for irrigation? Yes. NIBCO states the SI-8 gate valve’s solid wedge, integral seats, and bi-directional service make it a good choice for irrigation services. Can this be used for potable drinking water? Confirm current lead-free and potable water approvals for the exact product before potable water use. Distributor information for SI-8 notes use in U.S. drinking water applications is prohibited after January 3, 2014. What warranty does NIBCO list? NIBCO lists the SI-8 gate valve as backed by a 2-year limited warranty. Why We Like It: The NIBCO N001266 SI-8 is a simple, dependable solder-end brass gate valve for compatible copper tube systems. Its full port design, standard handwheel, non-rising stem, solid wedge, integral seats, bi-directional service, and 200 PSI cold working pressure make it a practical choice for irrigation service, residential shutoff, light commercial systems, and general isolation valve applications where a 1/2" brass gate valve is specified.