Carrier KH43LS087 Filter Drier

The Carrier KH43LS087 is a high-capacity liquid line filter drier engineered to maintain refrigerant purity in residential and commercial split systems. Built with a high-density desiccant core composed of 100% molecular sieve, this OEM replacement part provides superior moisture absorption and acid neutralization, protecting the compressor from premature wear. Technicians often utilize this model for HVAC system maintenance because its 5/8-inch sweat connection ensures a leak-free, high-pressure seal during brazing. As a direct factory replacement for the KH43LG087, it is compatible with a wide range of R-410A (Puron) and R-22 equipment. The compact 9-inch steel housing is designed to withstand extreme operating temperatures while effectively trapping copper shavings and system debris. When performing a refrigerant filter drier replacement, this component ensures consistent flow control and prevents liquid flashing, which is critical for maintaining proper subcooling levels and overall system efficiency. This is a genuine Carrier part, ensuring the flow rate and pressure drop meet original equipment specifications.

• Enhanced Moisture Removal: Deep-bed desiccant core chemistry specifically targets moisture and acid buildup to prevent refrigerant piping corrosion.
• Universal Refrigerant Compatibility: Designed for use in both Puron (R-410A) and R-22 liquid lines with high-pressure ratings.
• Durable OEM Construction: Solid steel shell provides high burst pressure resistance, essential for high-ambient cooling applications.
• Efficient Contaminant Filtration: Multi-stage internal filtration captures particulate matter as small as 20 microns to protect TXV and metering devices.
• System Longevity: Helps prevent ice formation and acid-related motor burnouts by maintaining a clean refrigerant circuit.

What is the maximum allowable pressure drop for this drier?

For optimal performance, the pressure drop across the KH43LS087 should not exceed 2-3 PSI. If HVAC troubleshooting reveals a higher differential or a significant temperature drop, the core is likely restricted and requires replacement.

Can this be used on the suction line?

No, this is a dedicated liquid line filter drier. Installing it on the suction side will cause excessive pressure drop and may starve the compressor of oil and refrigerant.

Is this a bi-flow drier for heat pump applications?

This is a standard single-direction drier. For heat pump liquid lines, confirm flow direction or utilize a bi-flow equivalent to prevent internal damage during the heating cycle.

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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.