It's a tricky one, I have a small plumbing business and in my book a free estimate is a free estimate, but I don't bring my tools into a property for this, apart from a torch.
If I suggested to a customer I could do a temporary repair I would give them a price before starting any work.
I have a...
Always handy to state what area you live, can recommend someone but as its a very small job he won't travel miles.
Your location says Goldstone, apollogies if you actually do live in that area.