Oatey 3 in. Gripper Plastic Mechanical Test Plug-33402 - The Home Depot
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Model # 33402

Internet # 100168770

Store SKU # 238707

3 in. Gripper Plastic Mechanical Test Plug

Oatey 3 in. Gripper Plastic Mechanical Test Plug

This item has been discontinued.
The Home Depot no longer carries this specific product.

$4.55 / each


Model # 33402

Internet # 100168770

Store SKU # 238707

The Oatey 3 in. Plastic Mechanical Test Plug helps seal piping or holds pressure while testing a piping system. The plastic body has minimal to no rusting or corroding for a long-lasting use. The plug's wing nut helps make tightening and removing the plug easy.

  • Plastic plug body has minimal rusting or corroding
  • Use to seal piping or to hold pressure while testing a piping system
  • Ideal to plug open-ended 3 in. pipes
  • Maximum air pressure is 5 PSIG
  • Wing nut makes for easy tightening and removal
  • Made in the USA


Maximum Drain Diameter (in.) 
Minimum Drain Diameter (in.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Color Family 
Plumbing Category 
Plumbing Part Type 
Warranty / Certifications
Manufacturer Warranty 
1 year 


Rated 4.5 out of 5 by 2 reviewers.
Rated 5.0 out of 5.0 by Works fine with 3" (actual) PVC. . I found this plug fits a PVC drain pipe with an actual (as opposed to "nominal") inside diameter of about 3". The plug seals fine against both liquid and air. It comes from the factory with some white grease on the rubber ring, but I used plumber's grease to re-grease the rubber ring, the tapered plastic surfaces that expand the rubber ring, and the bolt and wing nut. With everything lubed this way finger tight is all that's needed to make a seal. BUT don't lube the outside of the plastic ring. PVC pipe is already slippery inside, and I had to remove the lube I first put on the outside of the plastic ring. The first reviewer is right, a stainless steel bolt and wing nut would be better, but then the plug would cost more. For temporary use the way it is works fine, for long-time use a stainless bolt, washers, and nut would of course be better. . September 12, 2014
Rated 4.0 out of 5.0 by Can be shaved to fit 2-1/2" basement cleanouts Been searching near and far for either a tapered lead 2-1/2" sewer cleanout or at exact fit 2-1/2" Oatey test plug to replace a rotted out cleanout plug. Typical of 50+ year-old Queens houses with a 2-1/2" sewer drain cleanout with rotted out C.I. threads the wife was concerned with not only sewer gases but as a entry-way for rodents and water bugs gaining access to house I about gave up trying to find something smaller than the 3-inch tapered lead cleanout plug which refused to fit not matter how I shaved/filed/customized the fit. As a last resort I used this 3-inch Oatey plug and spent the afternoon using a surform file to decrease the diameter of both the bottom plastic and corresponding rubber plug. All things considered this item will fit after shaving a bit of both the rubber plug and bottom red compression body. Only complaint is the wing nut and corresponding screw are cheaply plated and will eventually corrode with time. Queens, NY houses have predominantly 2-1/2" and 4' sewer cleanouts with horribly corroded threads making it a necessity for lead taper plugs as replacements. When new they fit remarkably well when coaxed with a mallet however they all deform when the same plug is removed for yearly sewer snaking. These Oatey plugs are more durable over the easily deformed tapered lead plugs. Only suggestion is to used stainless steel wing nuts and bolts. Suggestion is to have Oatey manufacture the same plug in 2-1/2" diameter August 18, 2013
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