shared water lines (Pittsburgh)

[Jonas DeVita]

Good morning Bigger Pockets, 

I have a rental property in Pittsburgh that is serviced by PWSA. There is a shared water line and the line that comes from my property to the property behind me (which I don't own) is leaking badly. Someone has to dig this up and repair it. This will be pretty expensive. My question is, because this is serving the house behind me, but it is on my property, would I be able to get either the owner of the house behind me to pay for it or get PWSA to repair it since it's technically their infrastructure? 

Kinda tricky. Look forward to hearing from you guys.