We designed this DeVilbiss 525DS rebuild kit to deliver a complete top-end service solution for 115V GSE ZW280 compressors. In addition, this kit directly replaces DeVilbiss part number 525D-643 and Invacare part numbers 1191916and 1167620. As a result, fresh internal seals quickly restore proper operating pressure and flow output to your oxygen concentrator.

• 2 - Piston Cups: High-durability replacement cup seals
• 2 - Cylinder Sleeves: Precision-matched replacement sleeves
• 2 - Head Gaskets: Heat-resistant silicone gaskets
• 2 - Cylinder Sleeve O-Rings: High-temperature sealing rings
• 2 - Flapper Valve Restraints: Stainless steel valve retainers
• 4 - Flapper Valves: Intake and exhaust reeds

Specifically, this service kit fits multiple 115V compressor configurations, including:

• DeVilbiss 525DS (5-Liter)
• DeVilbiss 515 & 303DZ models
• Invacare PerfectO2V

Furthermore, routine maintenance with a fresh DeVilbiss 525DS rebuild kit prevents costly downtime and unexpected equipment failure. Because worn piston cups lose their airtight seal over time, compressors often trigger low purity alarms, struggle to build pressure, or develop loud piston rattle. Therefore, replacing worn seals protects internal components and extends equipment lifespan. Finally, if you service 220V export units, please view our 220V kit listed below to select the correct components.

If you are looking for a GSE ZW280 - 220V repair kit click here: GSE ZW280 - 220V Compressor Kit

To purchase bearings for this compressor click here: GSE ZW280 Bearings