Oatey 33403 Plastic Plug (with Galvanized screw and wing nut), 4-Inch, Red

Very good for a sewer clean out cap. Fit perfectly and tightened by hand no tools sealed perfectly.

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

Great product. Used to test intercooler for heavy duty trucks and worked great.

This plug works great. Easy to use and durable.

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.

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.

Work great

awesome cover for drain cleanout