The MultiSump Aviation Fuel Tester is a pre-flight inspection tool used to sample fuel from multiple aircraft drain points (sumps) without needing to empty the tester after each check. It is designed to improve efficiency during fuel contamination checks while maintaining clear visual inspection of each sample.

The device allows pilots to collect fuel from several sump drains, inspect each sample in a transparent upper chamber, and then transfer it into a lower catch container using a quick-release mechanism. After all samples are collected, fuel can be safely drained or poured back (if uncontaminated and filtered, depending on configuration).

Most versions include an integrated fuel strainer (micro-mesh screen) which helps prevent debris or water from being reintroduced into the tank during pour-back operations. The tool is widely used in general aviation pre-flight procedures, especially on aircraft with multiple fuel drains.

Manufactured from fuel-resistant plastic and stainless-steel components, it is designed for repeated use in aviation ramp environments and supports quick, clean, and organized fuel sampling across multiple tank drains.

Key features include:

Samples fuel from multiple sump drains (typically up to ~8 points)
Transparent chamber for visual contamination inspection
Integrated catch can for multiple samples
Quick-drain mechanism for easy transfer between chambers
Built-in micro-mesh fuel strainer (on MultiSump+ versions)
Helps detect water and particulate contamination pre-flight
Fuel-resistant plastic + stainless steel construction
Designed for general aviation pre-flight checks
Reduces need for multiple separate fuel testers
Commonly used in piston aircraft with multiple tanks/sumps