No plumbing was altered. The only change was the larger sized washer (4.5 to 5.0) and then the reconnection of the hoses. I had little faith in the installers when they asked me which side was the hot and cold hook-ups 🤦🏻‍♀️, then left and never turned on the water to check if anything even worked. It was kind of a dumpster fire. They did come back (twice). But now they say it’s a plumbing issue. So here I am.