Call for leak at water heater. Met with Emily and discussed reason for call. She showed us the water heater, which had an active leak at the boiler drain. Water heater was a Whirlpool 40 gallon gas, from 2007. Copper gas line serving unit. No thermal expansion device present, no drip pan. Water pressure measured at ~60psi @3pm. Prv approximately one year old. Removed old water heater and installed a new Rheem 40 gallon gas unit. This includes a thermal expansion tank, new gas line, a gas shut off valve, and a drip pan. Pressurized unit, checked for function and leaks.