I had a tradesman install a rodding eye on an external access pipe which is the outflow for the toilet.
I assumed the rodding eye would look like

it turned out instead that he just drilled a hole in the existing pipe and screwed-on an attachment (I can't find an image of it).
It seems that the bottom is leaking so that when I flush the toilet, the water is coming out in the garden, so it's possible the rodding eye isn't flush against the pipe.
Obviously if it had been installed using the former tool I showed above this leak would be lessened, so I think it's because it's screwed-on it's more prone to this.
Before I ask him to come back to fix it, I want to know how it's supposed to be done properly because I imagine his solution is just going to be "stick a bit of sealant around the gaps". I don't think sealant will last indefinitely since it's outdoors also it seems like a patch up job.
thanks