Any addendum to a commercial lease for a dog groomer?

[Tal Mashhadian]

Have a dog groomer interested in leasing one of our commercial spaces.  Lease already has the tenant responsible for any plumbing repairs inside the unit and the landlord responsible for what's behind the walls.  But I'm concerned about the increased chances of clogged pipes.

Any suggestions for wording in the lease for having the tenant responsible for clogged plumbing due to the nature of the business?