How to measure water use during play

Measure your actual setup

Water use depends on supply, hose length and diameter, connectors, control setting, household demand, and the toy’s resistance. Universal gallons-per-hour claims are unreliable unless conditions are disclosed. Measure at the same outdoor connection and setting you plan to use, with children away from the test area.

The container test measures unrestricted flow at that point in your setup. A connected toy may restrict the flow, so treat the result as a useful baseline unless you can safely capture and measure the toy’s actual discharge.

• Use a container with a known volume and enough capacity for a stable timing run.
• Use the same hose, nozzle position, splitter, and connector planned for play.
• Time the fill and repeat at least three times.
• Record other household water use that might affect the result.
• Report repeated results or a range rather than one perfect-looking number.

Calculate gallons per minute

Gallons per minute equals container gallons multiplied by 60, divided by fill seconds. If one gallon fills in 20 seconds, the estimate is 1 × 60 ÷ 20, or about 3 gallons per minute. If a two-gallon container fills in 35 seconds, the estimate is about 3.43 gallons per minute.

Keep units consistent. A half-gallon container is 0.5 gallons; a 5-quart container is 1.25 gallons. Do not round the fill time before calculating, and use the same container for every comparison.

• Formula: gallons × 60 ÷ seconds = gallons per minute.
• Repeat inconsistent runs instead of averaging obvious timing mistakes.
• Round the final estimate, not the inputs.
• Write down the date and setup so a later test is comparable.

Estimate a play session

Multiply gallons per minute by the minutes the water is actually running. At 3 gallons per minute, 30 uninterrupted minutes would be about 90 gallons. If the water runs for three 8-minute intervals, use 24 minutes rather than the full time spent outside.

This is an estimate, not a utility-grade meter reading. Pauses, pressure changes, other fixtures, control adjustments, leaks, and toy restriction can change the total.

• Flow estimate × water-on minutes = estimated session gallons.
• Track water-on time separately from total play time.
• Include setup or rinsing time only when the hose is running.
• Use a range when flow or timing changes during the session.

Compare settings fairly

To compare a lower and higher setting, change only the control setting and keep the hose, connector, water source, and test method the same. Record whether the lower-flow setting still produces a usable pattern for that toy. Lower flow is not automatically better if it creates unstable pulsing, poor drainage behavior, or a play pattern the product was not designed to provide.

• Run each setting at least three times.
• Compare the median or a clearly reported range.
• Describe spray behavior separately from water use.
• Do not turn a single-yard result into a universal product claim.

Know what WaterSense covers

EPA’s WaterSense program provides a broader framework for water efficiency and labels qualifying products that meet EPA criteria. Outdoor water toys are not presented as a WaterSense-labeled product category. Splash.toys will not imply that a pad, play sprinkler, or water table is WaterSense certified.

EPA also reports that outdoor use is a substantial share of household water use nationally and can be higher in arid regions. That context supports measuring and managing a session, but it does not predict the cost or environmental impact at a specific home. Local rates, restrictions, climate, and water sources vary.

• Check current local watering rules before use.
• Use your measured setup rather than a listing photo to estimate consumption.
• Fix leaking hose connections before comparing settings.
• Repeat the test when the hose, splitter, source, or household conditions change.