1-1/4" Schedule 80 PVC Pipe Plain End - 1-5ft

The 1-1/4" Schedule 80 Gray PVC Pipe (Plain End, 5-Foot Length) is a heavy-duty, thick-wall thermoplastic pressure pipe manufactured to ASTM D1785, certified to NSF 61 and NSF 14, and rated at 520 PSI at 73°F — the correct Schedule 80 pipe for industrial process piping, chemical distribution systems, commercial irrigation mainlines, and any application at this size where Schedule 40 wall thickness or pressure rating is insufficient for the system specification. The 1-1/4" size is a common step-up from 3/4" and 1" branch sizes, appearing on irrigation pump discharge headers, well system pressure mains, chemical distribution headers, water treatment plant branch piping, and commercial building utility lines where flow volume has increased beyond what smaller pipe sizes can efficiently carry and Schedule 80 construction remains the material standard throughout the system.

The Schedule 80 wall thickness is the core specification advantage over Schedule 40 at every size, and at 1-1/4" the difference is concrete and consequential. Schedule 80 carries a 0.191" nominal wall versus the 0.140" wall of Schedule 40 at this size — a 36% increase in wall thickness that directly produces the higher 520 PSI pressure rating versus Schedule 40's 370 PSI, greater resistance to mechanical impact, improved rigidity under pipe loading, and the structural margin that industrial and commercial specifications require at every point in the system. Both schedules share the same 1.660" outside diameter at the 1-1/4" nominal size, meaning Schedule 80 pipe is dimensionally compatible with Schedule 40 socket fittings — though a full Schedule 80 system should pair Schedule 80 pipe with Schedule 80 fittings throughout, and any schedule mixing should be a deliberate engineering decision rather than an incidental substitution at the point of purchase.

The gray color is the universal job site and field identifier for Schedule 80 PVC pipe. At the 1-1/4" size — where systems are transitioning from residential and light commercial branch sizes into the commercial mainline range — gray identification is especially important for systems that will be partially buried, routed through walls and ceilings, or installed alongside Schedule 40 components in a mixed system. Gray means Schedule 80 without ambiguity, giving future inspectors, maintenance crews, and facility engineers an immediate material class confirmation at any point along the installed pipeline, decades after the original installation documentation has been archived or lost.

Plain end pipe is the standard format for solvent cement installation into socket fittings. Cut to required length with a PVC pipe cutter, fine-tooth handsaw, or power saw — deburr and bevel the cut end before solvent cementing into a Schedule 80 or Schedule 40 socket fitting for a full-strength, leak-free joint with consistent insertion depth. The 5-foot length is the standard distribution and online-sale cut length, well suited for equipment connections, short system runs, maintenance repairs, and any application where full 10-foot or 20-foot production sticks are impractical to handle or ship.

NSF 61 certification confirms this pipe is listed for potable water contact, and NSF 14 covers compliance with applicable plastics piping material standards — making the 1-1/4" Schedule 80 pipe appropriate for water treatment plant distribution, well system pressure mains, and institutional plumbing applications where listed materials are required at every component.

Key Features:

• Schedule 80 gray PVC — 0.191" nominal wall, 520 PSI rated at 73°F
• Manufactured to ASTM D1785 — the governing standard for Schedule 80 PVC pressure pipe
• NSF 61 certified for potable water contact; NSF 14 listed
• Plain end for solvent cement installation into socket fittings
• 1.660" OD — dimensionally compatible with all 1-1/4" PVC socket fittings
• 5-foot cut length for distribution, equipment connections, and repairs
• Gray color — universal Schedule 80 identification in the field
• Cell classification PVC 12454 per ASTM D1784
• Suitable for industrial, chemical, agricultural, and commercial pressure piping
• Pressure derated above 73°F per standard PVC temperature-pressure curves

Specifications:

Industries & Applications:

• Irrigation & Agricultural Systems — The 1-1/4" size is one of the most common Schedule 80 pipe sizes for commercial irrigation pump discharge headers, zone mainline distribution, and lateral supply connections on commercial farms, golf courses, athletic fields, and municipal landscape systems where system flow volume at the main has outgrown 1" pipe and Schedule 80's 520 PSI rating provides the required margin above pump operating and shut-off head pressures
• Industrial Process Piping — Used on 1-1/4" process water mains, cooling water distribution headers, chemical transfer lines, and plant utility piping in manufacturing, chemical processing, and light industrial facilities where Schedule 80 is specified throughout and the gray pipe identification confirms material class at every point along the installed system
• Chemical Processing & Distribution — PVC's resistance to acids, bases, chlorine, salts, and oxidizing agents makes Schedule 80 the pipe of choice for 1-1/4" chemical distribution mains, dosing system headers, and reagent supply lines in water treatment plants and industrial chemical environments; the 0.191" Schedule 80 wall provides additional structural margin over Schedule 40 under sustained chemical pressure service
• Well Systems & Pressure Mains — Used on 1-1/4" well pump discharge mains, pressure tank supply connections, and point-of-entry treatment system piping on residential and light commercial well installations where higher flow rates have driven the system beyond the 3/4" and 1" sizes and Schedule 80's pressure ceiling safely accommodates pump shut-off head conditions
• Municipal Water & Wastewater Treatment — NSF 61 listed for potable water contact makes this pipe appropriate for 1-1/4" distribution branch mains, chemical feed header connections, and instrumentation tap piping in water treatment plant environments where all materials in contact with water must carry NSF listing and Schedule 80 construction is the facility standard
• Pool & Spa — Commercial & Aquatic Facilities — Schedule 80 PVC is the preferred pipe material for 1-1/4" recirculation system mains, equipment pad supply headers, and chemical feed distribution at commercial pools, water parks, and aquatic centers where continuous chlorine and chemical exposure would degrade metal alternatives and Schedule 80 construction satisfies facility engineering specifications
• HVAC & Commercial Mechanical Systems — Specified on 1-1/4" chilled water mains, condenser water distribution lines, and hydronic heating headers in commercial mechanical systems where the designer has specified Schedule 80 PVC for the main distribution runs; the plain end 5-foot format is convenient for field cuts during mechanical room and overhead installation where exact run lengths are determined in the field
• Laboratory & Institutional Plumbing — Used for 1-1/4" DI water distribution mains, process water headers, and reagent supply trunk lines in university, medical research, and pharmaceutical support facilities where material traceability, chemical purity, NSF listing, and Schedule 80 specification compliance are standard requirements at every system component