It devolved on defendant to prove, not only that the plumbing was defective, but that its condition rendered the premises untenantable and. that the landlords, with knowledge of these facts, violated an agreement to keep the premises in repair. [Delmar Investment Co. v. Blumenfield, 118 Mo. App. 308; Roberts v. Cottey, 100 Mo. App. 500; Graff v. Brewing Co., 130 Mo. App. 618.] The most that may be said of the evidence of defendant is that it shows the plumbing became defective during the course of the tenancy and that plaintiffs were informed of the existence of the defect. It does not appear that the premises were untenantable, or that plaintiffs were under any duty to keep them in repair. In the case presented in the record, it is clear that plaintiffs are entitled to recover rents for the months of May and June, and that the court did not *6err in peremptorily instructing the jury to retnrn a verdict in their favor. [Corby v. Book & Stationery Co., 76 Mo. App. 506; R. S. 1899, sec. 4110.] The judgment is affirmed. All concur.