Recently purchased Duplex, bad tenant, sewer line repair

[Ben Beaudoin]

I purchased a duplex a few months ago with existing tenants, the lower unit tenant was not on a lease and is currently several months behind on rent, not related to covid. Water backed up in that unit this week and the plumbing company is saying the main line galvanized pipe is collapsed and 48' of it needs to be replaced, the concrete will need to be broken up and re-poured, the repair estimate they provided was for $15,000. So now that tenant will have no plumbing or much of a livable area for at-least a couple weeks until all repairs are made. If there is no lease in place, they are behind several months in rent and the unit is unlivable, I am still told from my property manager that we cannon remove the tenant due to the moratorium and that the unlivable unit falls back on us for liability, does anyone know if this is true?