ANSI/ISEA Z358.1 emergency shower requirements, explained
A plain-language guide to the standard that governs emergency shower and eyewash equipment in North America — and what it means for your site.
What ANSI/ISEA Z358.1 covers
ANSI/ISEA Z358.1 is the North American standard for emergency eyewash and shower equipment. It sets minimum performance requirements for flow rate, duration, water temperature, placement and testing, so that a worker exposed to hazardous substances can decontaminate immediately and effectively.
| Requirement | What the standard says | How Mahikan units meet it |
|---|---|---|
| Flow rate | Minimum 20 US GPM for showers | 400-gallon capacity supports full-duration, full-flow operation |
| Duration | Minimum 15 minutes of continuous flushing | Extended-duration design built specifically for longer flush requirements |
| Temperature | Tepid fluid: 16–38°C (60–100°F) | Heated, temperature-controlled supply, monitored continuously by onboard PLC |
| Accessibility | Reachable within 10 seconds, unobstructed | Self-contained and mobile, so the unit is positioned at the hazard, not the nearest plumbing |
| Activation | Operational in 1 second or less, hands-free once activated | Pump starts automatically when the entrance door is opened |
| Testing | Weekly activation, annual inspection | Automatic weekly maintenance cycles with 24/7 remote monitoring and alerts |
Tepid water is the hard part in northern climates
Meeting the flow and duration numbers is straightforward; keeping flushing fluid between 16°C and 38°C on a northern Alberta or northern U.S. site in January is not. That's why Mahikan builds fully self-contained, heated units with arctic specifications rated to −50°C — the temperature requirement is engineered in, not left to site plumbing.
ANSI Z358.1 questions we hear most
How long must an ANSI Z358.1 emergency shower run?
ANSI/ISEA Z358.1 requires emergency showers to deliver flushing fluid for a minimum of 15 minutes at a minimum flow of 20 US gallons (75.7 litres) per minute.
What water temperature does ANSI Z358.1 require?
The standard requires tepid flushing fluid, defined as between 16°C and 38°C (60°F to 100°F), which is why heated, temperature-controlled units matter on Canadian sites.
How close must an emergency shower be to a hazard?
ANSI/ISEA Z358.1 requires emergency equipment to be reachable within 10 seconds of the hazard, on the same level, with an unobstructed path.
How often should emergency showers be tested?
Plumbed units should be activated weekly to verify operation, with a full annual inspection against the standard. Mahikan units automate weekly maintenance cycles and monitor performance continuously.
Need a compliant unit on site?
Our team can confirm the right configuration for your hazard and climate.