Use Only OEM Parts for Equipment to Maintain GMP System Integrity

Do Not Replace Equipment Parts with Non-OEM Alternatives in GMP Systems

Remember: Always use original equipment manufacturer (OEM) parts for GMP systems — substitutes may affect validation status, performance, and compliance.

Why This Matters in GMP

GMP equipment is qualified using specific components that meet design, material, and performance standards. Substituting OEM parts with generic or locally-sourced alternatives — such as filters, valves, seals, or sensors — introduces variability and compromises the validated state. Even minor deviations in material composition, dimensions, or tolerances can affect equipment performance, process parameters, or product quality.

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For instance, using a non-OEM filter in a sterile HVAC system may reduce filtration efficiency, introducing microbial or particulate risks. A third-party temperature probe may report incorrect readings, affecting heating cycles or data integrity. Such substitutions often escape immediate detection but contribute to long-term system failures or regulatory issues.

Regulatory and Compliance Implications

21 CFR Part 211.63 requires that equipment be designed and maintained to ensure reliable operation. EU GMP Chapter 3 mandates proper maintenance and control of equipment using validated parts. WHO GMP emphasizes the use of approved components in GMP systems to maintain qualification status and avoid compliance breaches.

Auditors review

equipment change records, maintenance logs, and part sourcing documentation. Use of non-OEM components without documented equivalency studies or change control approvals may be flagged as critical findings, especially if linked to equipment failure or product impact.

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Implementation Best Practices

Maintain a master list of GMP equipment along with BOMs (Bill of Materials) specifying OEM part numbers. Develop SOPs that restrict procurement and installation to OEM-certified components unless a documented equivalency and QA approval exists. Track part replacements through maintenance logs and calibrate critical instruments post-installation.

Train engineering and maintenance teams on identifying approved components, part compatibility, and change control procedures. Maintain purchase records and certificates of conformance from OEMs. Include part substitution as a risk factor in deviation investigations and equipment validation reviews.

Regulatory References

– 21 CFR Part 211.63 – Equipment design and maintenance
– EU GMP Chapter 3 – Equipment and facilities
– WHO TRS 986, Annex 2 – Equipment qualification and maintenance
– ISPE Baseline Guide Vol. 5 – Maintenance Practices in GMP

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