This is an interesting thread
Lilly, I'd stick to your guns,IMO the leak on that fitting was caused by however capped off the cooker outlet, and you have all the evidence you need to argue your point.
I notice this is a pic of the connection point "prior to you moving in"
That means nothing, and it looks secure enough to me to withstand a knock (providing the fittings have been installed correctly)
Where is their pic of the connection point showing the state of it prior to it being disconnected and capped off.because that's more relevant.
I reckon its much more likely that whoever did this,
caused the leak shown in the video
Item six
The thing that's bugging me is the tee prior to the outlet, is just a bit off pipe bent over and solder capped?
I notice it was there prior to you moving in and also notice it's not there amongst the disassembled bits in the pic of the fitting breakdown.
Oh I'd definatly be sticking my guns
Matt