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Gas system inspection under G 607

Testing centre or approved skilled worker · Leisure vehicles

Since June 2025Every two yearsSeparate from the HU

Three different legal situations on this topic circulate side by side, because the rule changed twice in four years — which means older guides are not merely imprecise but simply out of date. Until 2022, proof of the gas system inspection was a precondition for passing the periodic roadworthiness test (Hauptuntersuchung, HU — commonly called 'TÜV'). From 2022, it was decoupled from that: the HU no longer required it. And since 19 June 2025, leisure vehicles with a permanently installed liquid gas system are again subject to a separate inspection obligation under the technical rule DVGW G 607.

The decisive difference from the old position lies in the word “separate”: the inspection is no longer linked to the Hauptuntersuchung. It runs on its own cycle — every two years — with its own appointment. Anyone who wants to combine it with the HU can arrange this organisationally, but should not rely on the HU reminding them about the gas system inspection. It does not.

All leisure vehicles with a permanently installed liquid gas system are now covered — motorhomes, caravans and campervans — regardless of whether the system is used while driving. This exact feature used to be decisive and no longer is: the former distinction between trailers and motor caravans, and the question of heating while driving, no longer apply.

Only a skilled worker approved for this purpose may carry out the inspection — at testing centres, specialist workshops or via mobile testing services. The proof is documented on an inspection certificate. What is deliberately missing here is a price: the inspection is not an administrative service and has no fee ordinance.

Last updated29 August 2026
Legal basisTechnical rule DVGW G 607
VerificationChecked against StVZO, FZV, FeV and BetrSichV
Written and reviewed byAndrés Sánchez Botta
Independent information website: we are not TÜV, DEKRA or any other testing organisation, not an authority and not a paid advice service – we do not submit applications on your behalf. All information comes from official sources and is explained here in plain language; binding information always comes from the competent body. No legal advice and not an official authority. We are neither lawyers nor tax consultants: we document official procedures and check the information against the official source – this is information, not legal or tax advice.
Mandatory again since19 June 2025For leisure vehicles
CycleEvery two yearsOwn rhythm
Relationship to the HUSeparateDecoupled since 2022
BasisDVGW G 607Technical rule
Required documents

What you need

The last inspection certificate

It provides evidence of when the last inspection took place and therefore marks the start of the two-year cycle. Without it, the due date can only be estimated.

Registration certificate Part I (Zulassungsbescheinigung Teil I)

For identifying the vehicle and its body type. It is needed for trailers just as for motor caravans — the former distinction no longer applies.

Documents on modifications to the gas system

Retrofitted appliances, relaid pipework, replaced regulators: this work is part of the inspection and should be documented.

Accessible system

The cylinder locker, regulator, pipework and appliances must be accessible. Blocked storage space is a common reason for a second appointment.

No proof needed for the HU

This line is here because it is often searched for: since 2022, the Hauptuntersuchung no longer requires the gas system inspection. The obligation still exists — just separately.

Step by step

How to proceed

  1. 1

    Classify your own case

    Leisure vehicles with a permanently installed liquid gas system are covered, regardless of use while driving and regardless of whether the vehicle is a trailer or a motor vehicle.

  2. 2

    Determine the due date from the last certificate

    The cycle is two years. Because it is not tied to the HU, no one will remind you — the appointment must go in your own calendar.

  3. 3

    Appoint an approved testing centre or skilled worker

    Testing centres, specialist workshops and mobile testing services are all options. Ask in advance about approval for G 607, not merely about experience with gas systems.

  4. 4

    Make the system accessible

    Clear out the cylinder locker and expose access to the pipework and appliances. This shortens the appointment and avoids a second visit.

  5. 5

    Keep and carry the certificate

    It is the proof required for checks, campsites abroad and the insurer. A photograph on a telephone does not replace the original everywhere.

Fee information

Costs and payment

Obligation, cycle and scopeNo administrative fee, no fee ordinance
BasisDVGW G 607
Mandatory again since19 June 2025
AffectedPermanently installed liquid gas system
Use while drivingNo longer relevant
CycleEvery two years
Relationship to the HUSeparate since 2022

Because the inspection is not an administrative service, there is no official tariff. Prices differ considerably between testing centres, workshops and mobile services.

Good to know

Important notes

The most dangerous sentence on this topic is the one from the interim period: “The gas system inspection is no longer mandatory.” Put this bluntly, it was almost correct between 2022 and June 2025 — today it is wrong. Since 19 June 2025, the inspection obligation applies again to leisure vehicles with a permanently installed liquid gas system.

The inspection is separate from the Hauptuntersuchung. This is convenient, because it no longer blocks the HU appointment, and risky, because neither appointment reminds you of the other. Note both due dates separately.

The former distinction based on use while driving no longer applies. Anyone who relies on the assumption that their system is only operated while stationary is applying a rule that no longer exists.

G 607 is a technical rule, not a statutory provision. It describes how the inspection is carried out; it becomes binding through the obligation to keep the system in a safe condition. This is why the rule is cited here and not a statutory reference.

Avoid these mistakes

Common mistakes

Relying on the legal position from 2022 to 2025. Since 19 June 2025, the inspection obligation applies again.

Waiting for the HU to act as a reminder. It has not required this proof since 2022.

Distinguishing by use while driving. This feature no longer applies.

Appointing any workshop. The inspection requires an approved skilled worker.

Not carrying the certificate. It is the only proof, including abroad.

Frequently asked questions

Questions and answers

Is the gas system inspection mandatory?

Yes, again. Until 2022, it was a precondition for passing the Hauptuntersuchung, it was then decoupled from that, and since 19 June 2025 a separate inspection obligation under the technical rule DVGW G 607 applies to leisure vehicles with a permanently installed liquid gas system. Information from the intervening period is out of date.

Is it carried out together with the HU?

Not automatically. Since 2022, the gas system inspection has been decoupled from the Hauptuntersuchung and runs on its own two-year cycle. You can combine both appointments organisationally, but should not rely on the HU reminding you about the gas system inspection.

Does it also apply to caravan trailers?

Yes. Leisure vehicles with a permanently installed liquid gas system are covered — motorhomes, caravans and campervans alike. The former distinction between trailers and motor caravans, as well as the question of whether the system is used while driving, no longer apply.

How often must the inspection take place?

Every two years. The cycle begins with the last inspection, as documented on the inspection certificate. Because it runs independently of the HU, the due date should be noted separately.

Who may carry out the inspection?

Only a skilled worker approved for this purpose — at testing centres, specialist workshops or via mobile testing services. Experience with gas systems is not sufficient; ask explicitly about approval for G 607.

How much does the examination cost?

Deliberately, no figure is given here. The gas system inspection is not an administrative service and has no fee ordinance; prices differ between testing centres, workshops and mobile services. Comparing providers is worthwhile, particularly when a mobile service includes travel costs in its price.

Related official procedures

Periodic roadworthiness test (Hauptuntersuchung)
First after 36 months, then every 24
No official tariff
Lift inspection
Under the BetrSichV, carried out by a ZÜS
Operator’s duty
Modification approval (Änderungsabnahme)
Otherwise the operating licence lapses
§ 19 Abs. 3 StVZO

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