1Preparation and Safety

Gather all necessary tools and materials and ensure you have a safe workspace. This includes:

Choose a well-ventilated outdoor area away from ignition sources like heaters, smokers, or electrical outlets. Petrol vapors are highly flammable, so proper ventilation is critical.

2Draining the Petrol

Use the siphon hose to transfer remaining fuel into the approved container. If the tank is mounted on a vehicle, ensure the engine is cool and disconnect the fuel line if needed to avoid residual fuel flow.

3Removing Loose Impurities

Reach into the tank with the soft-bristled brush to loosen deposits from the bottom and inner walls. Avoid applying excessive force, especially if the tank is made of plastic, as this could cause cracks.

Use lint-free cloths attached to a long stick if the tank is deep to wipe away loosened dirt and rust flakes. Repeat this process until most visible loose impurities are removed.

4Using Solvent for Stubborn Deposits

Pour a small amount of the solvent into the tank enough to cover the bottom and swirl it gently to coat the inner surfaces. Let the solvent sit for a short period as recommended by the solvent's instructions to break down thick sludge.

Then, use the brush again to scrub any remaining stuck-on deposits, and siphon out the solvent along with dissolved impurities.

5Final Rinsing and Drying

Use a small amount of fresh petrol to rinse the tank's interior—this helps remove any leftover solvent residue that could mix with fuel later. Siphon out the rinse petrol and leave the tank open in a well-ventilated area until it is completely dry.

Check the tank's interior one last time to ensure all deposits are gone, then reconnect or reinstall the tank if removed and refill it with fresh petrol.