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The Best Plumbers Test Plugs of 2021

  Updated on 19 October, 2021

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Quality-Checked
Generated From 25K+ Reviews!
Bestseller No. 1
Cherne 270040 Rubber Test Ball Pipe Plug, 4" , Black
  • 4" RUBBER TEST-BALL PLUG: Tests drain, vent, and waste systems in every type of pipe, and...
  • BROAD EXPANSION RANGE: Inflatable design fits easily in tight situations, offering broader...
  • VERSATILE USES: Can seal both round and out-of-round pipe, and it fits easily through test...
  • ZINC-PLATED STEEL CHAIN AND RING HANDLE: Act as an anchor to prevent the plug from sliding...
SaleBestseller No. 2
IPS Corp 83593 Twist-Tite Mechanical Test Plug, 3 inch, 7.2...
  • The test plug measures 3 inches in diameter
  • Constructed of high-impact ABS plastic for a rust-proof, corrosion-proof solution
  • Equipped with a Neoprene gasket to ensure a secure-tight fit
  • Features an oversized die-cast wingnut for easy removal of the test plug if necessary
SaleBestseller No. 3
DANCO PlugAll Mechanical Test, Seal & Cleanout Pipe Plug |...
  • Mechanical test plug for drains and cleanouts
  • Expandable test plug fits 1-1/2 inch AND 2 inch pipes
  • Fits pipes with threads and pipes without threads
  • Ergonomically designed handle turns and expands patented rubber gasket to provide air and...
Bestseller No. 4
Cherne 276348 3 in-4 in. Multi-Size Test-Ball Plug, Black, 3...
  • One size fits multiple pipe diameters, doing the job of 2+ single-size plugs.
  • Use to block flow (water DWV test) or as a back plug for sewer air testing.
  • Seals both round and out-of-round pipe.
SaleBestseller No. 5
Sioux Chief 3" Test Plug (6ER16)
  • Polypro wingnut, nylon top plate, soft pvc gasket and nylon base/stem for simplicity and...

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Buyer's Guide: Plumbers Test Plugs

Plumbers Test Plugs - Is Your Plumbing Device Rigid and Effective?

A certified Plumber's seal is the rubberized exterior seal on a pipe that prevents water from leaking out. Most leaks come from the tap; the resulting water damage is expensive and can also affect your health if you are allergic to certain chemicals. A properly installed and serviced water line is essential for any homeowner, but it becomes particularly crucial when your toilet or drain has been clogged with grease, mineral deposits, or other fittings. If you have identified a problem, a plumber's seal can be of enormous help in resolving the issue.

There are many types of Plumbers Test Plugs available in the marketplace. Some are made of synthetic rubber while others are made from hardening resins (HPR). Hardening resins are injected into the pipe joints. The resin is melted and injected into the affected area, where it hardens into a solid form, like a rock. Once hardened, the resin seals against the surrounding pipe wall.

A typical Plumbers Test Plugs will have one of two different methods of application: the soft ring or the hardening annulus. The soft ring is shaped similar to an engagement ring - it has a central channel, which has holes around it. The annulus is thicker and has a flat surface on each end. These are typically used on sewer and storm water pipes. The annulus is most useful in preventing slippage.

After injecting the hardening resin, the sealant is applied to the inside of the hardening ring. The inside of the ring has holes, which is the place the insert goes through. The insert is guided through the holes and the size depends on the diameter of the pipe. To activate the resinous plug, a special tool is pushed into the holes, activating the resinous compound through the insertion into the pipe.

If a greenie is present on the pipe joint seal, it indicates that the product is not fully cured. A properly hardened greenie needs to be replaced with a new batch. A greenie can appear as a white hard substance on the inside of the annulus - this indicates that the product has become slightly warm due to the heating process. If this is the case, the new insert may need to be smaller than the original to accommodate the heat-treated pipe joint seal.

An inflatable gasket is used for the purpose of testing pipeline flow. An inflatable gasket is similar to a rubber band, however it has larger adhesives and a greater thickness. It can be placed over a section of pipeline to test its resistance to flow. This can be compared to the use of a greenie to find out if proper sealing has been done.

Once the Plumber has located the defects in the seal, he/she will apply the desired amount of sealant and place a thin piece of foam on the patch. Plumbers then inflate the gum tube with the correct amount of air. Once the greenie is located on top of the air bubble, the Plumber will pull on the rubber ring to remove the greenie. Once the strip is removed, the Plumber will place the stripped section of the pipe into the appropriate section of the pipe where the epoxy resin has been applied. Once the entire section of pipe is filled, he/she will reseal the faulty area of the pipe.

The last step involves placing the treated section of pipe into the appropriate areas of the gasket. Then the resin is spread evenly onto the pipe surface. In order to have a uniform flow of air through the pipe, the hardener must be uniformly distributed over the length of the pipe. There are generally two types of hardeners available for plumbing applications: galvanized and thermoplastic. Galvanized hardeners provide a strong and durable seal; however, they can only be installed on natural gas or liquefied petroleum gases (LPG), because they contain a small amount of metallic iron.