Customer has a slow drip stain in ceiling of main level bathroom. Customer agreed to have the sheetrock, open and access What was potentially leaking. Found it to be the pea trap of the upstairs hallway bathroom tub. Ranwater for roughly five minutes and found no water leaking from the drain itself.We then ran water through the overflow and found nothing.After running the shower head a few minutes later it started leaking down. The customer is thinking about having the shell removed as it is cracked. While performing diagnostics, I noticed that the water heater was very corroded.On the inlet to the water heater and that it was also ten years old.They had an old water softening system in the area.That they had cut out, and the newer pipe is actually leaking. I gave them a quote to replace the fifty gallon gas.The pressure regulating valve emergency shut off and rework.The plumbing near and above the water heater. As well as quotes to take care of the shower head and shower valve. Thank