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I've traced my mouse problems back to a large hole in the wall behind my fridge. The problem is, there's a line running through it--I assume it's the water line, as there is a black power cord plugging the fridge into the wall elsewhere. How can I seal this hole without messing with the water line? I have "Great Stuff" gaps and cracks sealant spray--will that work? Pictures attached of hole. Thanks in advance for any and all advice!

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    You're playing whack-a-mole. The mice aren't entering the building envelope there. If you seal a hole in drywall they'll make another one. Seal the actual entrance. – isherwood Feb 17 at 22:24
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    Best to remove mice problem first, before patching, next place might not be so nice. They can also chew power cables and plastic water pipes, both bad news. – crip659 Feb 17 at 22:31
  • @isherwood you're right, but unfortunately I live in an apartment but there's only so much I can do on that front unless the landlord gets off his lazy ass and handles it himself. Even if it's a band-aid, would sealing this hole help? – AmatuerCoder Feb 17 at 22:40
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    Get some steel wool and put it in there with some ally cat food bars. (Ally cat is a brand and mice eat it and go away. – Ed Beal Feb 17 at 22:47
  • Wouldn't feeding the mice make the problem worse? – AmatuerCoder Feb 17 at 23:46
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Whooooaaaa!

Leaking refrigerator lines are the #1 cause for house damage. They are usually on the main floor, in an expensive area of the house, and once they start leaking water just pours out.

So mouse issue is one thing. A mouse issue (they bite EVERYTHING) next to a fridge water line - disaster waiting to happen. Ticking time bomb.

You are going to do a 2 for 1. Have less of a chance for water issues and get rid of that hole.

Step 1 - Buy a fridge shutoff valve

enter image description here

Step 2 - Take out drywall and install valve

You need to cut out a small rectangle - 12x18"ish. Put Shutoff valve on a stud, attach it. Put water line into the valve - test it. Replace drywall over it.

Step 3 - Basic mud and tape and plug back line to fridge.
It's behind a fridge so you don't have to be perfect.

So hole is gone and your fridge line meets modern plumbing code.

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  • Excellent points and a great answer. Unfortunately, OP is a tenant and the landlord sounds like he won't allow this level of work by his renter. – FreeMan Feb 18 at 12:48
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I had this issue and duct tape worked for me but another post above is right that they’ll find another way in if you don’t block off all possible access.

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    Don't duct tape walls. That's not what duct tape is for, and when the summer comes, the glue will melt and you have a bigger mess. – Nelson Feb 18 at 4:07

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