Arrived to remedy a system suspected of leaking water. Upon inspection of the system found a puddle of water around the furnace and water heaters. Opened up the furnace and did not find any water inside. Checked the exterior of the furnace and did not see any points where water could have been dripping down the case of the furnace. Started checking around the system looking for a source of water. Found a plumbing line that is heavily corroded and has clearly been leaking for a long time. Ran the ac to ensure that there is not more than one issue. Air conditioner was draining condensation properly. Reached out to a plumber to create a bid to have the plumbing repaired.