Plug, MPT PVC Schedule 80 3" (850-030)

The 850-030 is a 3" PVC Schedule 80 plug with a male pipe thread (MPT) end, designed to cap or close off any standard 3" 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.

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 850-030 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.

As a threaded plug rather than a solvent-weld cap, the 850-030 is removable — a practical advantage in systems where a capped port may need to be reopened for future branch connections, instrumentation installation, system flushing, or maintenance access. The all-PVC construction provides excellent resistance to a broad range of acids, alkalis, and industrial chemicals, making it well suited for chemical process, water treatment, and industrial service environments where metal plugs would be subject to corrosion or galvanic incompatibility.

Specifications:

Industries & Applications:

• Industrial Process Piping — Capping unused 3" threaded ports on Schedule 80 manifolds, tees, and valves in high-pressure chemical and process fluid systems
• Chemical Processing — Closing off threaded pipe ends and fitting ports in corrosive service environments where metal plugs would degrade or introduce contamination
• Municipal Water & Wastewater — Temporarily or permanently capping threaded ports at pump stations, treatment facilities, and distribution system test points
• Irrigation & Agriculture — Sealing unused threaded outlets on high-pressure mainline fittings, manifolds, and valve assemblies
• HVAC & Mechanical — Capping threaded test ports, gauge connections, and unused branch outlets in chilled water and condenser water systems during commissioning or maintenance
• Aquaculture & Water Treatment — Closing threaded ports on tank supply and recirculation manifolds where future access or branch connections may be required