Homeowner had leak underneath the kitchen sink. Found the basket strainer retaining nut was cracked and leaking. During walkthrough of the home it was noted that the water pressure regulator was not functioning properly and the thermal expansion tank had a blown air bladder. While working under the kitchen sink the garbage disposal had signs of rusting. The replacement was given at a discounted rate. Pressurized system and verified system was functioning properly. Walked through with the homeowner to check for any issues.