Cracked Closet Flange

[Busbreath]

Closet flange!
I could not edit title...
Our new-to-us 2002 Monaco monarch needed a new seal on the toilet where the trap door is. We have the thetford bravura toilet which must get removed to do this. Found that the closet flange was cracked down into the seal area so assume it must be replaced. It appears to be a glued in one. What is the best way to extract the entire closet flange and prep for a new one. Ours has the black tank right below with a very short drop. Luckily, the floor is very solid and no repair needed there, just the closet flange. Thanks for any advice or help!
Doug

[Ray,IN]

assuming it is plastic, can you use JB Weld for plastic to repair the crack? If it's metal, ordinary JB Weld should work.

[Busbreath]

The flange is black ABS plastic, and the crack goes to where the anchor bolt is. Gluing would not be permanent most likely.

[l1v3fr33ord1]

Busbreath-

Welcome to iRV2!

Second, you should add a "signature" to your profile. It contains whatever info you want; most people put info about their coach there, so they don't have to type it into each message. Instructions for adding a signature are here.

While we're waiting for someone with RV experience to chime in, here is a link to a Google search for the phrase "toilet flange repair kit."

Finally, if you click on the "exclamation point in a white triangle" icon to the left (in the yellow box) it will open up message request to the moderators. You can ask them to modify the thread title, or for instructions if you can do that yourself.

[jacwjames]

If the flange has to be replaced I have had success with replacing PVC type fittings by taking a hack saw blade and cutting several (4-5) grooves around the flange making sure only to cut the outer piece. Put 2 grooves closer together to start from. After cutting I take a chisel and start at one groove and "gently" start chipping away the portion that has to be removed. Te pieces will break away pretty clean, in most cases you can just glue another PCV piece on, but you may have so some cleanup it get the new piece to slip on easily.

Just did that this weekend, I added an extra drain in the driveway and tied it into the downspout drain for the roof. Had to remove a 4" long sweep elbow and replace with a "Y", just cut some slits and cheisel the old one off.

Back ~3 years ago I was having my basement poured and had a number of drains set. The worker running the motorized wheel barrel ran right over one breaking the Pee Trap. I luckily had the tools and quickly cut the grooves and chiseled if off and had it replaced without ruining the main drain pipe. The concrete crew never saw this done before. My only concern would have been if I wasn't there what would they have done, >> just tape it together (which would have resulted in water building up under the concrete and foundation)!!!

[Busbreath]

While my closet flange appears to be glued in, it is the internal part of the joint, not the external like you described. Does that change anything?

[Swim Coach]

Originally Posted by Busbreath

While my closet flange appears to be glued in, it is the internal part of the joint, not the external like you described. Does that change anything?

Look for a JSC Socket Saver
I used on of these when remodeling, They actually work quite well.
They are available in many different sizes.
https://www.amazon.com/Jones-Stephen.../dp/B000HE5E0A

[jacwjames]

Same concept if it is on the inside of the flange. I've taken out pieces on elbows and joints. Cut grooves, space 2 close together, then using a chisel gently tap out the smallest piece. The rest should follow.

[tderonne]

Sure it's glued in? When I replaced the black tank in my old Class C, the toilet flange was threaded. Just had to unscrew it.

Looks like there are both male and female threaded ones, might not be immediately obvious it is threaded.

RV closet flanges

[Rkesselus]

Black ABS can be melted with MEK

[Brob]

Black ABS is a fairly easy and permanent repair.
There are a couple different ways to do so.
A quick Google search will yield a few results. I have ground up a fitting to melt into a Crack previously; it's been there for 5 years and still no issues.

[Busbreath]

I have abs filament from my 3d printer but with the flange against the floor acting like a heat sink it would be hard to weld full depth. I believe I will cut it out if it does not unscrew. I don't see threads below the flange boss so it is likely not threaded on. Hopefully I won't have to fish anything out of the black tank - not my kind of fishing ..

[2Newsomes]

From what I have seen the flange is glued to the ABS and the ABS slips through a seal at the top of the black tank. Once unbolted from the floor the flange and ABS should pull free.

[Old-Biscuit]

Save yourself alot of hassle and trouble....just use a Flange Repair Kit
https://www.amazon.com/Toilet-Flange.../dp/B078HGCYYJ