Product Overview

The liquid line filter drier, EK-305, is a compacted bead-type filter drier used in commercial HVAC and refrigeration systems, with a 5/8" flare (M/M) connection. It's a universal replacement liquid line drier compatible with CFC, HCFC, and HFC refrigerants, including R-12, R-134a, R-22, R-404A, R-407C, R-410A, R-500, R-502, and R-507, making it a versatile stock item for distributors serving HVAC and refrigeration technicians.

Worn or saturated filter driers typically show up as reduced cooling performance, moisture or acid contamination in the refrigerant system, or a restricted, blocked liquid line. GSK Auto manufactures this filter drier to the EK-305 specification at our Ningbo, China facility, with every unit tested before packing. We supply at wholesale volume with low MOQ and support private label packaging, with our team available to help confirm compatibility before shipping.

Replacement OEM Numbers

Cross-Reference OEM Number

048214, 83-EK-305

(Confirm connection size and refrigerant compatibility against your system's original component before ordering — these are commonly listed cross-references, not a guarantee of exact fitment for every variant.)

What Is a Liquid Line Filter Drier?

Function: The filter drier removes moisture, acid, and particulate contaminants from refrigerant in the liquid line, protecting the compressor and expansion device from damage while maintaining system efficiency.

Working Principle: Refrigerant flows through a compacted bead desiccant core inside the drier housing, where a blend of molecular sieve and activated alumina absorbs moisture and acid. A 20-micron outlet pad provides final filtration before refrigerant continues to the expansion device.

Importance: On commercial HVAC and refrigeration systems, a properly functioning filter drier is essential for preventing moisture-related corrosion, acid buildup, and restricted refrigerant flow.

Common Failures & Signs: Reduced cooling performance from a saturated or clogged drier. Frost or ice forming at the drier or downstream liquid line. Moisture or acid contamination detected during system service. Restricted refrigerant flow causing a pressure drop across the drier.

Key Features

680 psig maximum working pressure - rated for use with high-pressure refrigerants including R-410A.

20-micron filtration - compacted bead core with a fine outlet pad for maximum contaminant capture.

Optimized desiccant blend - molecular sieve and activated alumina combination for high moisture and acid removal capacity.

Solid copper connections - corrosion-resistant epoxy powder paint finish.

Shock-resistant construction - steel shell built to prevent desiccant breakdown under pressure spikes.

POE oil compatible - suitable for use with Copeland-approved compressor oils.

Tested before shipment - every unit checked before packing.

Benefits

Importers - stocks a widely used, universal-application filter drier for HVAC and refrigeration markets.

Wholesalers - steady demand from commercial HVAC service and installation work.

Repair Shops - tested unit reduces comeback risk on liquid line repairs.

Distributors - private label packaging available for building a branded catalog.

End Customers - restored system efficiency and protection against moisture and acid damage.

Packaging & Shipping

Standard export cartons. Customized packaging available for distributor branding. OEM-style and private label printing on request. Container loading handled directly, with mixed-SKU consolidation for smaller orders. Worldwide shipping to Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

Why Choose GSK Auto

GSK Auto manufactures factory-direct, keeping pricing tied to production cost. This filter drier is built to spec and tested before packing. We support low MOQ, private label packaging, and worldwide shipping, with our technical team available to help confirm compatibility before you order.

Call to Action

Sourcing EK-305 liquid line filter driers for HVAC or refrigeration systems? Contact GSK Auto for a wholesale quote, catalog, or OEM/private label cooperation.