Why would I need to go up to 2x4’s? The old window held up fine and redoing the whole wall with 2x4’s doesn’t sound like a fun job

I second that. Gravel is easy and relatively inexpensive.

Epoxy might seal the leak, but it won't repair the porcelain's structure. Given time, it will fail.

So are you building it out on the inside or outside? Because it seems like you will have to already go up to 2x4s to support whatever window you put back in there.

If you can't replace the tank, replace the whole toilet. It's not a difficult thing to do. Porcelain can't really be repaired. Now its structure is compromised. All it will take is the right amount of pressure at the wrong moment and it will fail and flood your house.

In which case OP should delete this post and probably their account.

Custom jamb depth is really expensive I found out, I think I’ll order without a jamb and use wood to trim it out

If it's only leaking after flushing it's a crack in the rim wash channel(s). Any crack will get worse with heat/cooling expansion/contraction. Eventually it'll grow...even if you use adhesive or sealant. You may be able to stop a growing crack by drilling holes at either end...but makes the risks of making the situation worse kind of high. I'm sure you're following the good/prudent advice of others saying replace replace replace! Good luck.

That is a crack in a double pane window. Will it lose some thermal efficiency? Yes but not enough to make a room freezing cold. You have other issues besides this.

I wish… that would be easy

Hahaha Nice, the only problem is that the whole trailer has just 6cm thick walls. So I’m afraid I don’t have space for double windows and I think that the rest of the trailers leaks more heat than 2 windows

I would replace asap. Aside from property damage caused by the leak, if the toilet fails while someone is using it, they could be grievously injured.

Unfortunately that’s only the inside. I have placed windows before but it’s the thin wall and cut siding that’s the problem

1 ‘pro’ did not want to take the job. Other Carpenter asks almost 3000 euro’s for 2 windows. Material costs are only 700 so that’s worth doing it myself

Yea I think this is the best solution.

Yep, it’s super easy! I’m a single woman, who is fairly handy and can figure stuff out and have been slowly renovating my house by myself, but replacing the toilet intimidated me so I just turned the water off for like 2 months and used a different bathroom lol. Untill final the other day I just did it. Watched a video, got a new toilet. Replaced it. Honestly easiest diy thing I’ve ever done. A plumber is absolutely not needed for this unless there’s an issue with the water line coming in. It was comical how easy it was!

try reading this. https://www.reddit.com/r/HomeImprovement/comments/221pej/windows_have_questions_get_in_here_i_have/

Yes do this straight away. And avoid Glacier Fucking Bay garbage from Home Depot unless you want to replace your shitter twice.

Use a strip of clear packing tape over the crack

Thanks for the feedback everyone! Much appreciated

We had that issue and fixed it by draining the talk and caulking both sides of the crack with waterproof sealer. It doesn’t leak and has bought us a few years so far.

The screw I was referring to would be on the handle. That one you showed is nothing that will help you. However, I can see that there are identifying marks on the mechanism that will help you identify a replacement.

Unless you want replace your floors as well, replace the toilet. If the tank fails when you are not home the autofill valve will just keep trying to fill the (now broken in this example) tank until the city runs out of water.

Not a single joke on here about the small leaky crack on everybody's toilet every morning... Shame!

This!!!! Replace it asap, if not you will be cleaning the flooded house showing your crack shown from your pant, when you bend and clean.