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Broken Sewer Cleanout Cap

Posted on 2/27/22 at 3:04 pm
Posted by TigerVizz87
Member since Dec 2021
164 posts
Posted on 2/27/22 at 3:04 pm


Any ideas on how I can get this SOB out to replace? There isn’t enough of anything to grab to unscrew. Any way to cut this out without damaging the threads?
Posted by gumbo2176
Member since May 2018
19974 posts
Posted on 2/27/22 at 3:11 pm to
I'd try hitting it all around with a real thin oil and letting it soak into the threaded area and trying to tap what's left to get it to unscrew before cutting it.

Those threads are not all that tight, so oil should penetrate the plastic threads easily. Then try again to unscrew it.
Posted by Tiger in Gatorland
Moonshine Holler
Member since Sep 2006
9541 posts
Posted on 2/27/22 at 3:12 pm to
Use a flat blade screwdriver and hammer. Place screwdriver on an edge of the broken plastic and tap with hammer in the direction to unscrew the cap to break the seal so to speak. Repeat until it's loose enough to hand turn the remainder of the way.
Posted by keakar
Member since Jan 2017
30152 posts
Posted on 2/27/22 at 4:44 pm to
just unscrew it and replace it, home depot and lowes has them

when replacing it use some wheel bearing grease smeared onto the threads so its easy to remove next time
Posted by TigerVizz87
Member since Dec 2021
164 posts
Posted on 2/27/22 at 5:28 pm to
Check the op for why that’s not really possible
Posted by lnomm34
Louisiana
Member since Oct 2009
12702 posts
Posted on 2/27/22 at 5:46 pm to
(no message)
This post was edited on 1/30/25 at 5:38 pm
Posted by uaslick
Tuscaloosa
Member since May 2011
1289 posts
Posted on 2/27/22 at 8:33 pm to
Use the screwdriver and hammer but just hammer it toward the center of the hole until what’s left of the cap breaks. Then pull the pieces out and replace with a new one.
Posted by East Coast Band
Member since Nov 2010
66950 posts
Posted on 2/27/22 at 9:21 pm to
Can you bolt a mending plate across the opening to both sides of what's left?
Then you could use a wrench on the mending plate to twist off
Posted by djangochained
Gardere
Member since Jul 2013
19143 posts
Posted on 2/27/22 at 9:33 pm to
Screw 2 screws 180 degrees apart and then use a screw driver to unthread the cap
Posted by Unobtanium
Baton Rouge
Member since Nov 2009
1911 posts
Posted on 2/27/22 at 10:07 pm to
Use a hacksaw blade to score a line across the inside of the threaded section, only deep enough for a flat blade screwdriver to 'catch'. Do this in two places, preferably across from each other.

Use screwdriver blade to pry open one section; the other should come right out.
Posted by gerald65
Moss Bluff, LA
Member since Jul 2020
710 posts
Posted on 2/27/22 at 11:51 pm to
Instead of using a screwdriver.... a chisel might work better. Start off hitting the screwdriver / chisel fairly light and then a little harder if the cap does not move.

Also, before using the screwdriver / chisel method, use the hammer to lightly tap on the cover cap. This should help "break" the seal that is holding the cap threads.
Posted by SaltyMcKracker
Member since Sep 2011
2966 posts
Posted on 2/28/22 at 6:01 am to
Scrap 2x6 cut at an angle and a pipe wrench
Posted by Le Tenia
Member since Feb 2015
4964 posts
Posted on 2/28/22 at 7:56 am to
Just fill it with concrete. It's too late now. Only other option is to bust all that concrete up and dig it up. Next weekend will be busy. I can fix it for 3 grand
Posted by Weekend Warrior79
Member since Aug 2014
21601 posts
Posted on 2/28/22 at 8:25 am to
Would heat work? Looks like there is a lot of PVC glue at the bottom of the broken cap. Would it make sense to heat the end of the screwdriver/chisel when doing it to get the cap to flex away. May screw up the threads in that one spot, but could also make it a little easier to get to the threads.

Another thought is would you be able to reverse some trigger clamps?
Posted by gumbo2176
Member since May 2018
19974 posts
Posted on 2/28/22 at 9:09 am to
There should be absolutely no glue on any of those threads since it is made to be removed to do a clean out if needed.

Like already mentioned by me, try to get some thin oil to penetrate the threaded area and tap it out using a cold chisel of big flat head screwdriver.

Remember, righty tighty, lefty loosey.
Posted by Weekend Warrior79
Member since Aug 2014
21601 posts
Posted on 2/28/22 at 10:04 am to
Should be is correct, was just thinking there may be considering the difficulties OP was having and the purple stuff you can see in the pic
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