Selling an air compressor: distinguish the compressor from the system
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Define what you mean by the compressor before agreeing a sale. The advertised package might include the compressor unit alone, a receiver-mounted assembly or several separately identified items. Fixed pipework and shared workshop services need their own boundary.
Photograph the accessible identification of each main unit and connect it to the inventory. Do not use the compressor's serial number as if it identifies every vessel or treatment unit in the installation.
Map the proposed package
| Part of the installation | Identity and records | Sale scope to confirm |
|---|---|---|
| Compressor unit | Manufacturer, model, serial and service evidence | Included unit and associated controls |
| Air receiver | Its own identifying details and available documents | Included, retained or separately assessed |
| Dryer | Model and relevant service records | Included with package or separate lot |
| Filters and other accessories | Identifiers and condition information | Exact items and quantities |
| Fixed pipework and site services | Available installation records and known connections | Boundary and work requiring competent assessment |
Use the dryer-and-filter allocation guide for the smaller items that are easily lost in a broad system description. State what remains unknown rather than drawing an assumed technical boundary.
Keep pressure records tied to the system
For Great Britain, HSE's pressure-systems guidance explains why the system, written scheme and competent-person role matter where the rules apply. Do not decide applicability from a single label or use this package map as a declaration of fitness.
The air-receiver document guide helps organise the records and questions. Ask the appropriate specialist what the proposed separation or change means for the equipment and its documentation.
Describe condition without claiming performance
A service invoice should identify what was done and when. A photograph of a pressure display does not establish output, efficiency or overall condition. Only state ratings and performance evidence supported by the correct records, with their conditions preserved.
Electrical evidence is another part of the file. The PAT-label guide explains why a label does not settle every safety question about a used item.
Check the workshop still has what it needs
Use the shared-factory-services guide where the compressor or associated equipment supports assets that remain in use. Selling one unit should not be planned on the assumption that every connected operation stops with it.
Disconnection, pressure-system work and removal need competent planning. This guide provides no depressurising, isolation or dismantling instructions.
Send the package map, photographs and available records to UK Auction Group. The sale discussion should identify a specific package with clear exclusions and unresolved specialist questions, rather than an undefined promise of the whole compressed-air system.
Explore the workshops and tools guides.
Sources
This guide gives general information. Equipment-specific, legal, tax and safety decisions may need a qualified adviser or competent specialist. The guides do not promise sale prices, fees or results.