Carrier KH43LG074 Filter Drier

As a veteran tech, you know that keeping a system clean is the only way to prevent callbacks. The Carrier KH43LG074 Filter Drier is a factory authorized part designed specifically for R-410A refrigerant circuits. This 16 cubic inch liquid line drier provides essential protection for the TXV and compressor by capturing moisture and solid contaminants down to 20 microns. With its 3/8-inch solder (sweat) connections and uni-flow design, it is a direct-fit replacement for several legacy Carrier, Bryant, and Payne models, including the 113ANA and 114ANA series. The solid core desiccant is engineered to maintain low pressure drops while neutralizing harmful acids that can lead to motor failure. Whether you are performing a routine liquid line filter drier replacement or cleaning up a system after a component failure, using this HVAC OEM part ensures the filtration capacity matches the original equipment specifications for high-pressure R-410A systems.

• Direct OEM Compatibility: Verified fit for Carrier, Bryant, and Payne equipment, replacing obsolete part numbers such as 322937-309 and KH43LG064.
• Robust Filtration: High-density 16 cu. in. core traps metallic debris and sludge to prevent metering device clogging.
• High Pressure Rating: Rated for up to 700 PSI, making it suitable for modern Puron (R-410A) high-side pressures.
• Solder Connections: Durable 3/8" ODF stubs allow for a reliable, leak-free braze into the liquid line.
• System Longevity: Effectively removes moisture and acid to prevent copper plating and oil breakdown inside the compressor.

Is the KH43LG074 bi-directional for heat pump applications?
No, this is a uni-flow liquid line drier. For heat pump vapor lines or reversing circuits, ensure you are following the flow arrow or utilize a bi-flow specific model if required by the system design.

What is the desiccant capacity of this unit?
This model features a 16 cubic inch effective volume, which is the standard sizing for most 1.5 to 5-ton residential split systems to ensure adequate moisture removal without significant pressure loss.

Should I replace this drier every time I open the system?
Yes. To maintain system integrity, a new filter drier should be installed whenever the refrigerant circuit is opened for service to handle any atmospheric moisture introduced during the process.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.