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Tank inspection & checks

So your tank doesn't become an environmental hazard.

We look in so nothing leaks out.

We've been looking inside tanks ever since Hans Müller founded “Hans Müller Tankrevisionen” in 1960. Today we're one of the oldest inspection and refurbishment firms in eastern Switzerland – for large and small tank systems made of any material.

View inside a large steel tank during inspection
This is what a tank looks like inside
Hans Müller Tankrevisionen founded
1960
where it all began
Petro-Handels GmbH founded
1997
locations: Wallenwil TG & Bern
2
WHAT WE DO

In, inspect, out clean

Tank inspections, tank room refurbishments and decommissioning for large and small tank systems – including testing and replacing overfill protection. We work according to the statutory guidelines.

  • Inspection of heating oil, diesel and petrol tanks
  • Visual checks, decommissioning and tank removal
  • Cleaning of industrial and chemical tanks
  • Installation of liners, tank room membranes, coatings and laminates
  • Troubleshooting tank equipment
  • Maintenance and refurbishment of tank systems
  • Design and construction of tank systems and new installations
  • Safety consulting and solutions
Inside a tank with a ladder during inspection
WHO FOR?

From boiler room to fuel station

Heating oilLetter from the authorities?Been asked to have your tank checked? We'll take care of the inspection or visual check of your heating oil tank – and you can simply file the letter away.
StationDiesel & petrolTank cleaning, inspections and visual checks at public and company fuel stations too.
IndustryIndustry & chemicalsCleaning of industrial and chemical tanks and inspections of large tank systems.
HOW A TANK INSPECTION WORKS

From empty to full again

  1. 01Book a dateWe plan the job – and clarify tank type, contents and volume in advance.
  2. 02Empty & cleanThe tank is emptied and thoroughly cleaned.
  3. 03Inspect insideInternal inspection and wall thickness check.
  4. 04Check safetySafety devices such as overfill protection are tested and replaced if needed.
  5. 05RepairWhatever isn't right gets fixed – right up to a liner or coating.
  6. 06Back in serviceRecommissioning and a report for your records.

We've been climbing into tanks since 1960. We know what lurks inside.

Spoiler: nothing that belongs in the groundwater
FROM THE FIELD

Freshly inspected.

TAMOIL, Brienzwiler
BRIENZWILER · 2026

TAMOIL

Tank inspection for the new TAMOIL station: tanks checked and prepared for operation – followed by Gilbarco dispensers and FAFNIR tank gauging.

Read the report →
GOOD TO KNOW

Questions about tank checks

A visual check examines the tank from the outside. A tank inspection goes inside: emptying, cleaning, internal inspection including wall thickness, checking safety devices, repairs and recommissioning – with a report.

Time for a tank check?

Request a quote for an inspection, visual check or consultation – or call +41 71 973 75 75.

Request a quote