Plug, MPT PVC Schedule 80 2-1/2" (850-025)

The 850-025 is a 2-1/2" PVC Schedule 80 plug with a male pipe thread (MPT) end, designed to cap or close off any standard 2-1/2" female pipe thread (FPT) fitting, valve, or pipe end. The MPT thread conforms to ANSI/ASME B1.20.1 NPT standards, ensuring reliable thread engagement and a leak-resistant seal when installed with PTFE thread tape or appropriate thread sealant applied to the male threads before assembly.

Manufactured from rigid, dark gray PVC compound conforming to ASTM D1784 cell classification requirements, the Schedule 80 wall construction provides the additional thickness and mechanical strength required for high-pressure service environments where a Schedule 40 plug would be undersized or underspecified. This makes the 850-025 the correct choice for capping threaded ports in Schedule 80 piping systems, high-pressure chemical lines, and industrial process assemblies where pressure integrity and chemical resistance are both critical requirements at the closure point.

As a threaded plug rather than a solvent-weld cap, the 850-025 is removable — a practical and often essential advantage in systems where a capped port may need to be reopened for future branch connections, instrumentation installation, system flushing, pressure testing, or maintenance access. At the 2-1/2" size, this plug is most commonly used to seal unused ports on large manifold fittings, blank off unused branch outlets on tees and crosses in phased installations, and close equipment nozzles and valve ports during construction, commissioning, and planned maintenance periods. The 2-1/2" pipe size appears regularly in industrial, municipal, and heavy commercial Schedule 80 systems — buyers sourcing this plug are typically working with a specific existing system specification, and the all-PVC construction provides excellent resistance to a broad range of acids, alkalis, and industrial chemicals, making the 850-025 well suited for chemical process, water treatment, and industrial service environments where metal plugs would be subject to corrosion, galvanic incompatibility, or fluid contamination concerns.

Specifications:

Industries & Applications:

• Industrial Process Piping — Capping unused 2-1/2" threaded ports on Schedule 80 manifolds, tees, and valve assemblies in high-pressure chemical distribution, cooling water, and process fluid systems where a removable, corrosion-resistant closure is required at unused connection points
• Chemical Processing — Closing off threaded pipe ends and fitting ports in corrosive service environments handling acids, caustics, and aggressive industrial fluids where all-PVC construction eliminates metal corrosion, galvanic incompatibility, and fluid contamination concerns at the plug interface
• Municipal Water & Wastewater — Temporarily or permanently capping 2-1/2" threaded ports at pump stations, treatment facilities, and distribution system valve assemblies during construction phasing, system commissioning, hydrostatic pressure testing, and planned maintenance periods
• Irrigation & Agriculture — Sealing unused threaded outlets on high-pressure Schedule 80 mainline fittings, manifold assemblies, and valve bodies in large-scale pressurized irrigation systems where unused ports must be closed during phased installation or seasonal system shutdown
• HVAC & Mechanical — Capping threaded test ports, gauge connections, and unused branch outlets in Schedule 80 chilled water and condenser water systems during commissioning, system balancing, and planned maintenance procedures
• Aquaculture & Water Treatment — Closing unused 2-1/2" threaded ports on tank supply manifolds, filter assemblies, and recirculation system components in large aquaculture and water treatment installations where future access or branch connections may be required