That can happen when they freeze, but I cannot see a split - maybe just a leaking joint?
Two elbows, joined by a short piece of pipe. Look like 20mm.
Flux wasn't cleaned off when soldered.
Andy
Look like 20mm.
Is it possible the flexi plastic pipe is leaking onto the joint?
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local