Water leak - who pays?

[Hunter Fitch]

I have a renter in a home that uses it for weekend getaways. It's in the woods where temperatures can freeze, so it's very common for people to shut off the water to the home if they are going to be away for any period of time. Sure enough my renter left the water on and a leak sprung on the back of the house. It didn't do any damage to the home and I was able to have a plumber over the same day we heard about it to fix it. Now the renter is complaining to me about the size of his water bill. I feel like I should not be on the hook for the bill but wanted feedback? Thanks!

[Deanna McCormick]

Install a water meter alarm, it hooks up to a phone line dials up number if it senses a continuous use of water so the property can be checked.

You need an addendum to lease that specifies that heat needs to be kept at 68 degrees or tenant will drain lines and shut off water if property is left for long period of time.

If this would have happened in a upstairs bathroom / frozen pipe / you could have really had serious damage. 

Even with an addendum for tenant regarding the water it's going to be a continuous concern and if its not shut down properly its a continued risk when vacant.