XXXXXXXX,
If you are taking a business use of home deduction for a Schedule C, you could claim this under repairs on form 8829. Otherwise, you will not get a benefit for this expense.
regards,
Mark D
Enrolled Agent
MBA, EA, Specializing in Business and Individual Tax Returns and Issues
This would be considered a second home and not a rental unless you could show an attempt to rent it out (advertising, property management company hired). If you can show it was a rental, you could file Schedule E with your expenses (to include the pipe repair) and take depreciation to produce a loss with limitations. If you take depreciation, please keep in mind the amount will be recaptured at ordinary rates when the property is sold. If this was not a rental, you may still deduct your interest and property taxes on Schedule A, but not the repairs. Also, you can never deduct lost projected rental income.
Regards,