12" Elbow 11.25° PVC Schedule 40 (411-120)
$283.99
The 411-120 is a 12-inch Schedule 40 PVC 11.25-degree elbow engineered for large-diameter piping systems that require the most subtle directional change available in the standard PVC elbow angle series — a gentle 11.25° offset that redirects large pipe runs with minimal disruption to flow velocity, system pressure, and hydraulic efficiency. At 12-inch nominal diameter, this fitting operates in the scale of municipal water infrastructure, industrial process headers, large-scale irrigation mainlines, and stormwater management systems where every degree of directional change and every point of pressure loss has measurable consequences on system performance, pump energy consumption, and long-term operational cost.
The 11.25-degree angle is the most gradual standard elbow offset in the PVC fitting series — half the deflection of a 22.5° elbow and one-eighth the deflection of a 90° elbow. In large-diameter piping design, this subtle angular offset serves a specific and critical role: navigating around site obstacles, accommodating gradual grade changes in buried infrastructure, aligning pipe runs with structure geometry, and creating long-radius directional transitions across extended pipe runs where the cumulative pressure loss of sharper elbows would require pump oversizing or velocity management measures to compensate. At 12-inch diameter carrying significant flow volumes, the hydraulic efficiency advantage of an 11.25° transition over a 22.5° or 45° elbow is not theoretical — it is a calculable reduction in head loss that directly affects pump selection, energy cost, and system operating pressure across the service life of the installation.
Fabricated from Schedule 40 rigid white PVC (Type I, Cell Class 12454), the 411-120 delivers the corrosion resistance, chemical compatibility, and long-term structural integrity that make PVC the dominant material specification for large-diameter water conveyance infrastructure. PVC does not rust, scale, tuberculate, or require cathodic protection — the progressive deterioration modes that drive the replacement cost of aging metal infrastructure and that PVC eliminates entirely across a service life measured in decades.
At 12-inch nominal diameter, the 411-120 is typically fabricated rather than injection-molded — a manufacturing distinction that experienced large-diameter pipe system engineers and municipal procurement teams understand and specify. Fabricated fittings at this scale are constructed from PVC pipe segments and plate stock using controlled manufacturing processes that ensure consistent wall thickness, dimensional accuracy, and structural integrity across the full fitting body. The fabricated construction is the correct specification for large-diameter fittings at this size — not a compromise, but the manufacturing method that delivers structural integrity at dimensions beyond the practical range of injection molding.
The socket x socket (slip x slip) end connections create permanent, pressure-rated solvent-welded joints with standard PVC solvent cement — bonding the fitting to the adjacent pipe sections in a monolithic assembly that eliminates the joint leak points, gasket maintenance, and long-term mechanical joint integrity concerns associated with flanged or mechanical coupling connections in buried and hard-to-access large-diameter infrastructure.
Specifications
| Attribute | Detail |
|---|---|
| Model Number | 411-120 |
| Nominal Size | 12 Inch |
| Fitting Type | Elbow |
| Angle | 11-1/4° (11.25°) |
| Schedule | Schedule 40 (Standard Wall) |
| End Type | Socket x Socket (Slip x Slip) |
| Material | Rigid White PVC (Type I, Cell Class 12454) |
| Max Temperature | 140°F (60°C) |
| Standards | ASTM D1784, ASTM D2466, NSF 61 (Potable Water) |
| Manufacturing Method | Fabricated |
Industries & Applications
The 411-120 is a precision directional fitting for large-diameter infrastructure where hydraulic efficiency, corrosion resistance, and long service life are the design imperatives:
- Municipal Water Distribution & Transmission — Large-diameter water transmission mains and distribution system trunk lines require precise directional control across extended underground runs where terrain, existing utilities, and right-of-way constraints dictate pipe alignment; the 11.25° elbow provides the most gradual standard directional change for navigating these constraints while maintaining the hydraulic efficiency and NSF 61 compliance required for potable water infrastructure.
- Municipal Stormwater & Drainage Infrastructure — Storm sewer trunk mains, detention basin outlet structures, and large-diameter drainage conveyance systems where 12-inch PVC mainlines must navigate around site obstacles and align with grade while maintaining maximum flow capacity; the 11.25° offset minimizes hydraulic resistance in gravity-flow drainage systems where every inch of available head drives conveyance capacity.
- Industrial Process Piping Headers — Large-diameter process water supply headers, cooling water distribution mains, and chemical process fluid conveyance systems in industrial facilities where the 11.25° elbow provides directional control on major process lines without the head loss and turbulence that sharper elbows introduce into high-flow industrial piping systems.
- Large-Scale Agricultural & Irrigation Mainlines — Center pivot irrigation mainlines, large agricultural district distribution mains, and golf course irrigation primary supply headers at 12-inch diameter where terrain-following directional changes across large property footprints require the most gradual angular offset available to maintain system hydraulic performance across extended pipe runs.
- Aquaculture & Water Park Infrastructure — High-volume recirculating aquaculture system (RAS) main headers and water park supply and return mainlines where large flow volumes, continuous operation, and the biological sensitivity of the water being conveyed make hydraulic efficiency and NSF-compliant PVC material the dual specification requirements.
- Industrial Fire Protection Supply — Large-diameter fire protection water supply mains in industrial facilities and large campus installations where underground supply main routing around site obstacles requires directional fittings that maintain full flow capacity and system pressure integrity at the flow volumes required for industrial fire suppression demand.
- Power Generation & Utility Cooling Water — Cooling water intake and discharge mains, once-through cooling system supply headers, and cooling tower basin supply lines in power generation facilities where large-diameter PVC provides corrosion-free conveyance of raw cooling water that would aggressively corrode metal piping alternatives.
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12" Elbow 11.25° PVC Schedule 40 (411-120)
The 411-120 is a 12-inch Schedule 40 PVC 11.25-degree elbow engineered for large-diameter piping systems that require the most subtle directional change available in the standard PVC elbow angle series — a gentle 11.25° offset that redirects large pipe runs with minimal disruption to flow velocity, system pressure, and hydraulic efficiency. At 12-inch nominal diameter, this fitting operates in the scale of municipal water infrastructure, industrial process headers, large-scale irrigation mainlines, and stormwater management systems where every degree of directional change and every point of pressure loss has measurable consequences on system performance, pump energy consumption, and long-term operational cost.
The 11.25-degree angle is the most gradual standard elbow offset in the PVC fitting series — half the deflection of a 22.5° elbow and one-eighth the deflection of a 90° elbow. In large-diameter piping design, this subtle angular offset serves a specific and critical role: navigating around site obstacles, accommodating gradual grade changes in buried infrastructure, aligning pipe runs with structure geometry, and creating long-radius directional transitions across extended pipe runs where the cumulative pressure loss of sharper elbows would require pump oversizing or velocity management measures to compensate. At 12-inch diameter carrying significant flow volumes, the hydraulic efficiency advantage of an 11.25° transition over a 22.5° or 45° elbow is not theoretical — it is a calculable reduction in head loss that directly affects pump selection, energy cost, and system operating pressure across the service life of the installation.
Fabricated from Schedule 40 rigid white PVC (Type I, Cell Class 12454), the 411-120 delivers the corrosion resistance, chemical compatibility, and long-term structural integrity that make PVC the dominant material specification for large-diameter water conveyance infrastructure. PVC does not rust, scale, tuberculate, or require cathodic protection — the progressive deterioration modes that drive the replacement cost of aging metal infrastructure and that PVC eliminates entirely across a service life measured in decades.
At 12-inch nominal diameter, the 411-120 is typically fabricated rather than injection-molded — a manufacturing distinction that experienced large-diameter pipe system engineers and municipal procurement teams understand and specify. Fabricated fittings at this scale are constructed from PVC pipe segments and plate stock using controlled manufacturing processes that ensure consistent wall thickness, dimensional accuracy, and structural integrity across the full fitting body. The fabricated construction is the correct specification for large-diameter fittings at this size — not a compromise, but the manufacturing method that delivers structural integrity at dimensions beyond the practical range of injection molding.
The socket x socket (slip x slip) end connections create permanent, pressure-rated solvent-welded joints with standard PVC solvent cement — bonding the fitting to the adjacent pipe sections in a monolithic assembly that eliminates the joint leak points, gasket maintenance, and long-term mechanical joint integrity concerns associated with flanged or mechanical coupling connections in buried and hard-to-access large-diameter infrastructure.
Specifications
| Attribute | Detail |
|---|---|
| Model Number | 411-120 |
| Nominal Size | 12 Inch |
| Fitting Type | Elbow |
| Angle | 11-1/4° (11.25°) |
| Schedule | Schedule 40 (Standard Wall) |
| End Type | Socket x Socket (Slip x Slip) |
| Material | Rigid White PVC (Type I, Cell Class 12454) |
| Max Temperature | 140°F (60°C) |
| Standards | ASTM D1784, ASTM D2466, NSF 61 (Potable Water) |
| Manufacturing Method | Fabricated |
Industries & Applications
The 411-120 is a precision directional fitting for large-diameter infrastructure where hydraulic efficiency, corrosion resistance, and long service life are the design imperatives:
- Municipal Water Distribution & Transmission — Large-diameter water transmission mains and distribution system trunk lines require precise directional control across extended underground runs where terrain, existing utilities, and right-of-way constraints dictate pipe alignment; the 11.25° elbow provides the most gradual standard directional change for navigating these constraints while maintaining the hydraulic efficiency and NSF 61 compliance required for potable water infrastructure.
- Municipal Stormwater & Drainage Infrastructure — Storm sewer trunk mains, detention basin outlet structures, and large-diameter drainage conveyance systems where 12-inch PVC mainlines must navigate around site obstacles and align with grade while maintaining maximum flow capacity; the 11.25° offset minimizes hydraulic resistance in gravity-flow drainage systems where every inch of available head drives conveyance capacity.
- Industrial Process Piping Headers — Large-diameter process water supply headers, cooling water distribution mains, and chemical process fluid conveyance systems in industrial facilities where the 11.25° elbow provides directional control on major process lines without the head loss and turbulence that sharper elbows introduce into high-flow industrial piping systems.
- Large-Scale Agricultural & Irrigation Mainlines — Center pivot irrigation mainlines, large agricultural district distribution mains, and golf course irrigation primary supply headers at 12-inch diameter where terrain-following directional changes across large property footprints require the most gradual angular offset available to maintain system hydraulic performance across extended pipe runs.
- Aquaculture & Water Park Infrastructure — High-volume recirculating aquaculture system (RAS) main headers and water park supply and return mainlines where large flow volumes, continuous operation, and the biological sensitivity of the water being conveyed make hydraulic efficiency and NSF-compliant PVC material the dual specification requirements.
- Industrial Fire Protection Supply — Large-diameter fire protection water supply mains in industrial facilities and large campus installations where underground supply main routing around site obstacles requires directional fittings that maintain full flow capacity and system pressure integrity at the flow volumes required for industrial fire suppression demand.
- Power Generation & Utility Cooling Water — Cooling water intake and discharge mains, once-through cooling system supply headers, and cooling tower basin supply lines in power generation facilities where large-diameter PVC provides corrosion-free conveyance of raw cooling water that would aggressively corrode metal piping alternatives.
