Tools & Microfiber2 min read

Measuring Hose Flow with a Collection Test: Litres per Minute in Practice

Estimate hose flow with a timed collection test, calculate litres per minute, and keep flow measurement separate from pressure.

Updated · NANOLAB Knowledge

A timed collection test can estimate the flow delivered by a hose in a particular configuration. It helps plan tank capacity and rinse time, but it does not measure pressure or establish that a nozzle is appropriate for a delicate surface.

Use a defined setup

Select a suitable container with a verified volume scale, a timing method and a safe collection arrangement. Measure at the actual outlet with the normal hose length, nozzle setting and supply condition. Follow equipment instructions and avoid creating splash or handling hazards.

Flow equals collected volume divided by collection time. An illustrative 6 litres collected in 30 seconds corresponds to 12 litres per minute. Record the original volume and time rather than only the calculated result.

Repeat enough to see instability

Repeat the collection under the same conditions and compare the results. Large variation may indicate an inconsistent supply, timing difficulty or a poorly controlled nozzle position. It should be investigated rather than hidden by a tidy average.

A small container filled in only a moment magnifies timing error. Choose a practical measurement interval and container appropriate to the flow. Do not claim hundredths of a litre per minute from a rough bucket mark and handheld stopwatch.

Apply the result carefully

At an illustrative 12 litres per minute, five minutes of continuous operation uses approximately 60 litres. Actual job use may differ because the trigger is released, other outlets operate or the nozzle setting changes. Measure those conditions when they matter.

Keep flow and pressure separate in purchasing discussions. Two systems can deliver similar flow with different pressure characteristics. For coated vehicles, use the nozzle, distance and procedure approved for the surface and equipment. The collection test is a planning measurement, not permission to increase force at the panel.

Related guidance

For product-specific application instructions, consult NANOLAB technical documentation or ask about your surface and intended use.