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Customer Reviews for Oatey Gripper 4 in. Plastic Mechanical Test Plug

Internet #100204964

Model #33403D

Store SKU #238710

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

Customer Reviews

  • 4.6
    out of 330 reviews
  • 86% recommend this product
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Showing 1-30 of 330 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.
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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
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    • Verified Purchase
    No issues; seals well....
    No issues; seals well.
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    • 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.
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    • 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.
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    • 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.
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    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.
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      • Recommended
      3 found this review helpful
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      • Verified Purchase
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      • Verified Purchase
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      • Verified Purchase
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      • Verified Purchase
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      • Verified Purchase
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      • Verified Purchase
      Works exceptionally well. Plenty of grip and resisted water intrusion from both directions
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      • Verified Purchase
      Poor quality merchandise
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      Response from OateyJan 9, 2024
      Thank you for writing a review. We realize your experience with our product has been less than ideal and we would like to have the opportunity to change that, as quality is a top priority at Oatey. If you are still having issues with this product, please reach out to us directly at technical@oatey.com so that we can help. Oatey
      • Verified Purchase
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      • Verified Purchase
      So far so good. Need to cap a rusted drain before it got repaired and this plug did the trick.
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      • Verified Purchase
      I installed this plug on my basement floor and I have no more smell which was strong.
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      • Verified Purchase
      Our village sent out a notice of power back washing the sewer lines. I wanted this plug as a "Just in Case" measure. It worked like a champ. I have heard some of my neighbors had problems but because the village sent out the message and a little pro-action, my basement was dry.
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      • Verified Purchase
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      • Verified Purchase
      Worked perfectly to plug up a 4” pipe left uncapped by the builder.
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      • Verified Purchase
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      • Verified Purchase
      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!
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      • Verified Purchase
      Perfect fit to cover the outside drain
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      • Verified Purchase
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      • Verified Purchase
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      • Verified Purchase
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      • Verified Purchase
      A must have
      [This review was collected as part of a promotion.] If you are going to be doing any plumbing or remodeling this is a must. I pulled my toilet to put down a new ceramic floor and this plug kept all the mast sewer gasses from filling up the house!
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        • Recommended
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        • Verified Purchase
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        • Verified Purchase
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