Knowing one's limitations

So the plumbers were supposed to come on Monday night to fix the leaking outside tap..
They didn't show. 
The boss gave the owner a tongue lashing on Tuesday and he promised they would come on Wednesday night, which they did.
I would never in a million years have known where to cut the hole in the drywall to get at the problem, the ceiling would have looked like Emmentaler by the time I would have found it. 
The plumbers knew though.

The blue pipe comes from the new tap they installed outside and it is connected to the white tap with an elbow connector.
Less than an hour and job done, all for CAD160.

(The extra shows the cause, a very small crack)

I am so glad I chickened out on this one and called the experts.

Ah well.