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Dental compressor pressure vessel inspection: what PSSR 2000 actually requires
Of everything in a dental practice, the pressure vessel inspection is the obligation most often assumed to be handled by someone else. It is a legal requirement, it is separate from your annual service, and the interval is not a number you can look up online — it is written in a document specific to your practice. Here is how it actually works.
The short version
- Pressure vessel inspection is a legal requirement under the Pressure Systems Safety Regulations 2000.
- It applies to your compressor and your autoclaves.
- It is not the same thing as a service, and is not automatically included in one.
- The interval is set by your Written Scheme of Examination, not by a universal rule.
- The certificate is your evidence. Without it, as far as a regulator is concerned, it did not happen.
Why your compressor counts as a pressure system
A dental compressor stores compressed air in a receiver. That receiver is a pressure vessel, and pressure vessels fail in ways that ordinary equipment does not — which is why they sit under their own regulations rather than general workplace equipment rules.
The same logic captures your autoclaves. Both are pressure equipment, both fall within PSSR 2000, and both need to be covered by a scheme of examination. Practices are sometimes surprised that the steriliser in the decontamination room is in scope alongside the compressor in the plant cupboard. It is.
The Written Scheme of Examination
This is the document everything else depends on, and it is the one most practices cannot immediately produce.
A Written Scheme of Examination (WSE) is prepared by a competent person. It identifies the pressure equipment in your practice and sets out how each item must be examined and at what frequency. Under PSSR 2000 the scheme must be in place before the system is operated, and the examinations must then be carried out in accordance with it.
There is no single universal interval. Your scheme of examination is what sets the frequency for your equipment, and that is the only figure that applies to your practice. Any interval quoted without reference to a scheme is somebody else's answer, not yours.
If you cannot lay hands on your scheme, that is the first thing to sort out — ahead of booking any inspection. Without it there is no defensible interval to work to, and no way to demonstrate the examinations you have had done were the right ones.
Who is a "competent person"?
PSSR 2000 uses the term deliberately. The competent person is responsible for drawing up or certifying the scheme of examination and for carrying out the examinations under it. In practice, for dental equipment, this function is usually provided through an engineering inspection service — frequently linked to an insurer, which is why you may hear the examination referred to as an insurance inspection.
The practical point for a practice manager: the person servicing your compressor and the person carrying out the statutory examination are not necessarily the same, and the competence required is not the same either. It is entirely reasonable to ask who is performing the examination and on what basis.
The distinction that catches practices out
This is the single most common gap we see, so it is worth being blunt about.
| Compressor service | Pressure vessel inspection | |
|---|---|---|
| Purpose | Keep the unit working well | Confirm the vessel is safe |
| Driven by | Manufacturer schedule | PSSR 2000 and your WSE |
| Status | Recommended | Legal requirement |
| Carried out by | Service engineer | Competent person |
| Produces | Service report | Examination report / certificate |
| Typical interval | Annual | As specified in your WSE |
A practice can be servicing its compressor diligently every single year and still have no valid pressure vessel examination. The service report is not the certificate. If your contract does not name both, assume you have one of them.
Quick check. Pull your compressor paperwork. Can you find a current examination report referencing a scheme of examination, distinct from the annual service report? If not, tell us what you have and we will help you work out where the gap is. We would rather you found it now than at inspection.
What happens at an examination
The examination is carried out to the requirements set out in your scheme, so the detail varies. Broadly, expect the competent person to assess the condition of the vessel and its safety devices, confirm the safety valve functions correctly, and verify the equipment remains fit for continued use at its operating pressure.
The output is a report. That document is what you keep, what you present at inspection, and what tells you when the next examination falls due. If a report identifies a defect requiring action, the timescale for that action is not discretionary — it will be specified, and it needs following.
How this shows up at CQC inspection
CQC assessment of a dental practice covers equipment maintenance and the records behind it. A missing pressure vessel certificate is a straightforward, documentary finding — there is no interpretation involved and no way to talk around it. Either the current certificate exists or it does not.
The wider point: nearly half the equipment in a practice carries some statutory obligation, each producing paperwork somebody has to hold. Our compliance calendar sets out every interval and record in one place, including which items are legal requirements and which are manufacturer guidance.
Frequently asked
Is pressure vessel inspection a legal requirement?
Yes, under the Pressure Systems Safety Regulations 2000. It applies to dental compressors and autoclaves.
How often does my compressor need inspecting?
As specified in your Written Scheme of Examination. There is no single universal interval.
Is it included in my annual service?
Not automatically. They are separate pieces of work with separate documentation. Check your contract names both.
What if I cannot find my Written Scheme of Examination?
Sort that first. Without it there is no defensible interval to work to. A competent person can prepare or certify a scheme for your equipment.
Not sure where your practice stands?
Tell us what equipment you have and what paperwork you can find. We will tell you what is missing and what needs doing — and if it turns out you are fully covered, we will tell you that too.
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