Write sump pump in lease

[Bernard Blake]

Hello Newbie here I have a unit with a sump pump in the basement can only access it by going into the unit to get down there. My question is can I write in the lease for the tenant just to have it plugged up on rainy days so the basement won’t flood or is that something that I would have to deal with ? Also I’m in Delaware 

[Scott Weaner]

I am confused. Our sump pump is always plugged-in.