December Gardening Checklist for Northern California Gardeners
Dec 20th 2025
The Schedule 40 PVC Threaded Plug is the professional solution for terminating any female pipe threaded connection in your irrigation system. Whether you are capping off an unused port on a manifold, closing the end of a threaded tee, or temporarily sealing a line for pressure testing, this plug ensures a leak-proof closure.
Molded from durable Schedule 40 PVC, this plug features standard Male Pipe Threads (MPT) and a hexagonal head for easy tightening with a wrench. Unlike slip caps that require glue, this threaded plug allows for future system expansion—simply unscrew it when you're ready to add a new zone or component.
Key details for system compatibility.
| Specification | Details |
|---|---|
| Product Type | Threaded Plug (MPT) |
| Connection Type | Male Pipe Thread (MPT) |
| Material | Schedule 40 PVC (White) |
| Operating Pressure | Up to 150 PSI |
| Manufacturer | Dura Plastics |
| MPNs |
450-005 (1/2"), 450-007 (3/4"), 450-010 (1") |
Follow these steps for a leak-free seal.
Step 1: Clean Threads
Ensure the female threads of the fitting you are plugging are clean and free of debris or old tape.
Step 2: Apply Tape
Wrap the male threads of the plug with 3-5 layers of thread sealant tape. Wrap in a clockwise direction (looking at the bottom of the plug) to prevent unraveling.
Step 3: Hand Tighten
Screw the plug into the fitting by hand until it is snug. Be careful not to cross-thread.
Step 4: Final Tightening
Use a wrench or pliers on the hex head to tighten the plug one additional half-turn. Do not overtighten, as this can crack the female fitting.
Verify this plug fits your system:
Ensure you have the essentials for a secure closure:
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