4″ DWV Pipe Plugs – 3-Pack Mechanical Test Plugs

Built for professional-grade pressure testing and temporary pipe sealing, these **4-inch mechanical test plugs** deliver a secure, leak-proof seal in standard DWV (drain-waste-vent) systems. The heavy-duty **ABS body** and **expansion rubber seal** ensure a tight fit without slipping, making them ideal for contractors, plumbers, and DIYers working on residential or commercial projects. Whether you’re testing for leaks, isolating pipes during repairs, or blocking openings for maintenance, these plugs provide a reliable, reusable solution.

Installation is quick and tool-free thanks to the **ergonomic wing nut design**, eliminating the need for wrenches or adhesives. Compatible with **4-inch ID pipes**—including PVC, ABS, copper, and cast iron—these plugs adapt to a wide range of plumbing applications. The **3-pack bundle** offers cost-effective efficiency, allowing you to seal multiple pipe openings across job sites without delays. Durable, corrosion-resistant hardware ensures long-term performance, while the compact design fits easily into toolboxes or work vans.