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Model # 33403D

Store SKU # 238710

Gripper 4 in. Plastic Mechanical Test Plug

$8.95
  • Seals or holds pressure while testing a piping system
  • Plastic body protects against rusting and corroding
  • Wing nut makes tightening and removing easy
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Product Details

The Oatey 4 in. Mechanical Plastic Test Plug is intended for use to seal piping or to hold pressure while testing the piping system. This plug has a wing nut for easy tightening and removal. Its plastic body will not corrode or rust.
  • End of pipe gripper plugs are made with ABS glass-reinforced plates for added strength
  • Extra large zinc wing nut for ease of tightening, no wrench required, and will not rust
  • Natural rubber O-ring for excellent expansion and memory
  • Plug is rated for 17 PSI or 40 ft. of head pressure
  • End-of-pipe seals only at the end of a pipe, preventing plug from falling into stack
  • Galvanized carriage bolt to prevent corrosion
  • Return Policy

Additional Resources

From the Manufacturer

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Specifications

Dimensions: H 1.75 in, W 3.75 in, D 3.75 in

Dimensions

Maximum Drain Diameter (in.)4Minimum Drain Diameter (in.)4
Product Depth (in.)3.75 inProduct Height (in.)1.75 in
Product Width (in.)3.75 in

Details

ApplicationFloorColor FamilyRed
Color/FinishRedFinishRed
MaterialPlasticPack Size1
Plumbing CategorySinkPlumbing Part TypePlugs & Stoppers
Returnable90-Day

Warranty / Certifications

Manufacturer Warranty1 year
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Questions & Answers

21Questions
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Q:Will it work on dvw copper?
by|Apr 1, 2023
1 Answer
Answer This Question

A:  Yes it has a usage range of 3.8"–4.06" ID.

by|Apr 4, 2023
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    Q:can this be used to seal off a toilet drain in the floor while working on the floor to keep the gasses from comming out
    by|Nov 3, 2022
    1 Answer
    Answer This Question

    A:  I don't see why not. I bought this for a cover for my main clean out because it was recommended by my plumber. Just make sure that the wider end is wider than your toilet flange so that there is no chance of it dropping in when tightening it down

    by|Sep 3, 2023
      1 found this answer helpful
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      Q:If you are selling your home, will this actually pass a plumbing inspection? Seems like it's just meant to be temporary but this is a bit out of my wheelhouse.
      by|Sep 28, 2022
      2 Answers
      Answer This Question

      A:  I used it as a plug for the clean-out of the bathroom stack (the old one was actually a cork). A plumber put one just like it in the kitchen stack clean-out. They work. As far as what an inspector would say in the process of selling the house, I can't say.

      by|Oct 1, 2022

        A:  This is an approved plug but you will need to check with your local municipality to ensure it is approved in your area. These are typically used for testing or temporary plugging of pipe and not a permeant plug.

        by|Sep 29, 2022
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          Q:Does this work on cast iron pipe?
          by|Aug 20, 2022
          1 Answer
          Answer This Question

          A:  Yes it does.

          by|Nov 2, 2023
            Showing 1-4 of 21
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            Customer Reviews

            4.6 out of 5
            (317)
            • 4.6
              out of 317 reviews
            • 86% recommend this product
            Filter by:
            Showing 1-10 of 317 reviews
            Plug does not fit inside of slab closet flange.
            The Oatey Gripper 4 in. test plug was too large and did not fit inside of Genova #75144 4" Slab Closet Flange.
            by
            Response from OateySep 7, 2023
            This is an end of pipe test plug. It is not designed for use with closet flanges. Oatey
              Best test plug replacement...
              Best test plug replacement
              by
              • Verified Purchase
              No issues; seals well....
              No issues; seals well.
              by
              • Verified Purchase
              I use these for mineral feeders. I generally use them as the top and bottom plugs. I've had some ...
              I use these for mineral feeders. I generally use them as the top and bottom plugs. I've had some in use for over two years. The pic is of an older design, I no longer put the little piece of pipe in the bottom, I just push the plug farther up in. It works better that way, less built-up.
              by
              • Verified Purchase
              • Recommended
              The staff said there was no product in store to seal a toilet drain when removing a toilet, howev...
              The staff said there was no product in store to seal a toilet drain when removing a toilet, however when we did an Internet search this came up. I then found it on HD site and it was available in the very store we visited. Ended up ordering from a different location for pickup. It works great after all the back and forth to find it.
              by
              • Verified Purchase
              • Recommended
              5 found this review helpful
              Initial viewing: Sioux chief The Gripper 4” Mechanical Test Plug is constructed using durable pl...
              Initial viewing: Sioux chief The Gripper 4” Mechanical Test Plug is constructed using durable plastic wedge plates and a sturdy, pliable rubber sealing grommet. The threaded carriage bold and cast wing nut, are both cleanly threaded and operate smoothly. The top plate is 4 9/32” and will prevent it from falling into a 4” opening, while the bottom plate is 3 23/32” that easily fits in a 4” opening. Testing: I constructed a test pipe using 4” PVC piping, stepped down to ¾” steel nipple that I attached a 15 psi test gauge (see photo). I placed the test plug into the open end of the 4” pipe and then pumped in 15 pounds of air. The first test resulted in a fast decompression. I tested for leaks and found them around the plug. I tightened the plug to the maximum, using a set of vice grips and tested again. The second test resulted in a slow leak. I then made sure that the cut on the open end of the 4” PVC was exactly square and tested again. The integrity of the seal remained solid and it held 15 psi for 2 hours. Summary: I found this product to be made with excellent materials, the type that will result in a good long useful life span. Though the grommet is made of nice durable rubber, it is only 5/8” thick and needs to be exactly square against the walls of the pipe, to seal correctly. I would use this mostly for just temporally closing openings.
              by
              2 found this review helpful
              Works great for what it's designed for. As long as you have a clean, round opening, it will easil...
              Works great for what it's designed for. As long as you have a clean, round opening, it will easily and securely seal a toilet drain or other open pipe.
              by
                • Recommended
                3 found this review helpful
                Worked perfectly to plug up a 4” pipe left uncapped by the builder.
                by
                  by
                    It’s certainly easy to find, in our front yard. I don’t think, if these even we re made, when we bought this house 30 years ago, that I would have been able to find one. Our clean out doesn’t have threads on it, so this works great!
                    by
                      Showing 1-10 of 317 reviews