Tech came out to perform heating maintenance inspection. Tech tested the heating system: checked gas pressure, temperature, exhaust fan amperage test, blower motor amperage test, flame rectification sensor test, exhaust fan vacuum test and a combustion analysis. Furnace is in great working order at this time. Client declined plumbing planned service for today as they recently had everything replaced. Water pressure in the home is good at 60 psi. Tech made a note that the main water shut off plastic union nut is seeping very very slowly. This is below the main water shut off. Tech informed and showed the client. Tech quoted work. Client thanked us for coming out.