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  1. Central Air-Conditioning System Inspection - InterNACHI

    Condensate drain lines collect condensed water and drain it away from the unit. They are located on the side of the inside fan unit. Sometimes there are two drain lines—a primary drain line that’s built into …

  2. Heating and A/C Overflow - InterNACHI

    To kill fungus, prevent organic buildup, and keep your primary drain running smoothly, pour one cup of a 50/50 solution of bleach and water into the opening at the condensate drain line where it leaves the …

  3. If a heating or cooling system is installed in an attic space and the unit is producing condensate, you will find a condensate drain line coming from the eaves and discharging to the exterior.

  4. TPR Valves and Discharge Piping - InterNACHI

    The valve should be connected to a discharge pipe (also called a drain line) that runs down the length of the water heater tank. This pipe is responsible for routing hot water released from the TPR to a …

  5. How To Inspect Tankless Water Heaters - InterNACHI

    The TPR value would be used for pressure relief. Check the condensate drainage. All condensate must drain and be disposed of according to local codes. Check for indications of scaling or corrosion. …

  6. Plumbing Terms - InterNACHI®

    To drain all waste water and sewage discharged from these fixtures into the public sewer, or private disposal system. It is, therefore, very important that the housing inspector familiarize himself fully …

  7. AC Condensate Trap - Inspection Gallery - InterNACHI®

    AC Condensate Trap: AC condensate trap. License All images copyright © 2008-2025 the International Association of Certified Home Inspectors, Inc. (InterNACHI). All ...

  8. How to Inspect and Correct a Vented Crawlspace - InterNACHI

    In addition to the primary drain (and as a safety precaution if the primary drain fails), an auxiliary drain pan with a separate drain beneath any cooling or evaporator coil is recommended to prevent …

  9. Inspecting Gas-Fired Boilers - InterNACHI®

    For condensing boilers, ensure that condensate drains properly to the sewer or directly outdoors. Because the condensate is highly acidic, follow local code requirements regarding pretreatment of …

  10. Inspecting the Dryer Exhaust - InterNACHI®

    According to InterNACHI's Standards of Practice, home inspectors are required to inspect the mechanical exhaust system for the clothes dryer. The clothes dryer must vent directly to the …