should a renter pay for repairs in commercial space?

I own a medical practice for which I rent space. The landlord happens to be the Dr. I bought the practice from. It's a basement level space with water damage. Most recently a pipe burst requiring plumbing repairs. Landlord says I bought the practice, so I should repair it despite the purchase agreement not listing plumbing, electrical and flooring specifically. My casualty insurance is only paying for damages, not repairs by the way.