

🔧 Seal it, test it, trust it — the pro’s choice for pressure-proof piping!
The Oatey 33403 Plastic Plug is a robust 4-inch end-of-pipe sealing solution designed for professional-grade pressure testing. Featuring a glass-reinforced ABS body, corrosion-resistant galvanized hardware, and a natural rubber O-ring, it ensures a secure, tool-free installation that withstands up to 17 PSI. Trusted by plumbing pros for over a century, this plug delivers reliable, long-term performance in both residential and commercial piping systems.
| ASIN | B000H5T1PI |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #3,933 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Expansion Plugs |
| Brand | Oatey |
| Color | Red |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,797) |
| Date First Available | July 25, 2007 |
| Global Trade Identification Number | 00038753334035 |
| Included Components | (1) Mechanical plug |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 8 ounces |
| Item model number | 33403 |
| Manufacturer | Oatey |
| Material | Plastic |
| Measurement System | Inch |
| Number Of Pieces | 1 |
| Number of Handles | 1 |
| Number of Items | 1 |
| Part Number | 33403 |
| Product Dimensions | 3.75"W x 3.75"H |
| Shape | Round |
| Size | 1 Count (Pack of 1) |
| UPC | 038753334035 |
| Warranty Description | 1 year limited. |
I**H
Very easy and good quality sewer cap .
Very good for a sewer clean out cap. Fit perfectly and tightened by hand no tools sealed perfectly.
R**Y
Best RV dump plug
A buddy of mine put in an RV dump that goes into his septic tank. I got this plug and installed it instead of the PVC screw on plug and it's awesome! Those screw on ones are fine when you first buy them, but when they get dirt in the threads, or the plug gets damaged or it's super cold out, etc, etc, they are a pain to remove and re-install. Well, for me they are because I have Parkinson's and my hands don't do what I want them to. This little unit works so easy, and you can use it on threaded or smooth pipe openings and it seals tight no matter what. Even with the tight fit, it is still easy to remove. It's built rock solid too
E**N
Works great
Great product. Used to test intercooler for heavy duty trucks and worked great.
J**I
Durable Plug
This plug works great. Easy to use and durable.
J**R
Very good product at a good price.
This plug was used to replace an old cap that had failed on a sewer clean out access. It worked as intended, and is a much better solution than the previous part.
R**E
Perfect for dryer vent
We used this to close off an unused dryer vent, and it fits absolutely perfectly. I had purchased another item on Amazon that was for that stated purpose but it actually didn’t fit (my exhaust vent was a touch too small). This was perfect and seems airtight.
T**H
Test plug
Work great
S**R
awesome product!
awesome cover for drain cleanout
N**O
Only hope is it lasts forever. If the wing nut design could have been changed to be flush with the floor, it would be an added advantage
J**S
Bought this to seal off a toilet flange that we are no longer needing. This toilet flange was too hard to remove and at some point we may want to reinstall the toilet. The 4 inch sized one works perfect. A nice tight seal.
H**.
Good product, but slightly overpriced
S**E
Cumple para lo que fue echo
M**Y
C pas standard jai du aller au magasin en acheter un autre
Trustpilot
1 month ago
2 months ago