Plumber Negligence lead to water damage

[Shelly Mainus]

My furnace recently died and I hired the local fuel company to install a 10k furnace. The price seemed pretty steep but it died when it was -30 out and I had tenants in the unit. Two weeks after the install I get a call from my tenants that a pipe burst and the entire basement was full of water. It turns out that when they installed the furnace they took an old part (30 years old) and stuck it on my new furnace and of course had no intent to install the correct new piece. That part exploded resulting in the flood. The assistant manager at the store is trying to make me put in a insurance claim with my homeowners instead of using their insurance. I have a $1,000 deductible and don’t want to have to pay out for their negligence. Do I have grounds to sue? Suggestions?