Safety Showers: Key Insights and FAQs
Emergency safety showers—often referred to as drench or decontamination showers—play a vital role in any workplace safety plan, particularly in environments like labs or industrial facilities. These devices are designed to rapidly flush harmful substances from the body after accidental exposure, helping to prevent injury and reduce long-term health risks.
In this article, we’ll cover the essentials of how safety showers work, when and where they should be installed, and which standards apply. We’ll also explore different system types and link to useful resources.
Quick Facts at a Glance
- Safety showers are first-response tools designed to wash hazardous substances from the body.
- Devices should meet international standards such as EN 15154-1, EN 15154-5, or ANSI Z358.1 to ensure reliability and effectiveness.
- Showers must be located close to hazardous zones and tested routinely for readiness.
- They are not appropriate where there’s risk to the eyes from hazardous materials, or where a consistent supply of clean, pressurized water cannot be guaranteed.
What Is a Safety Shower?
A safety shower is an engineered emergency unit that delivers a large flow of water to cleanse the body after exposure to chemical or thermal hazards such as acids, alkalis, heat, or contaminants. Medical follow-up is strongly advised after use.
How Do Safety Showers Operate?
These units activate when a user pulls a handle or presses a lever, initiating a continuous, high-volume stream of water designed to decontaminate the affected person. The flow should last for at least 15 minutes to meet standard safety guidelines.
When Are Safety Showers Required?
Installation is typically required wherever hazardous substances are stored or used. Risk assessments, chemical safety data sheets, and workplace protocols will guide whether emergency showers are necessary. Personnel should be trained in their use.
When Should You Not Install One?
Safety showers are unsuitable if eye injuries are a risk—strong water jets may worsen eye damage. Similarly, in locations without a stable source of clean, potable water, a fixed emergency shower may not be the right solution.
Where Should They Be Positioned?
The ideal placement is close to hazardous zones—easily accessible, clearly marked, and unobstructed. They should be on flat, slip-resistant surfaces. Some local regulations may also specify exact distance or signage requirements.
Available Types of Safety Showers
- Freestanding units are most common in industrial sites.
- Wall-mounted or ceiling-mounted showers are preferred in lab and training settings.
- Barrier-free models are designed for accessibility and inclusivity.
What Standards Govern Their Use?
- EN 15154-1: Laboratory-specific installations
- EN 15154-5: Industrial and other non-lab environments
- ANSI Z358.1: Covers international performance and installation criteria
- Some countries may enforce additional local or national standards.
Required Flow Rates
To comply with standards:
- EN 15154-1: ≥ 60 litres/minute for laboratory showers
- EN 15154-5: Showers classified by output from 30 to over 100 litres/minute
- ANSI Z358.1: ≥ 75.7 litres/minute (20 US gallons)
What’s the Right Water Temperature?
Water must be tepid—not too cold, not too hot:
- Above 38°C: Risk of scalding and enhanced absorption of chemicals
- Below 16°C: Risk of hypothermia and reduced user compliance
EN 15154 recommends 15–37°C, ideally 20–25°C
ANSI Z358.1 specifies 16–38°C
Do Showers Need Heating?
Yes—if installed in areas subject to freezing. Insulated piping and heated water supply lines are critical. However, freeze protection is not a substitute for systems that maintain tepid water during operation.
How Often Should They Be Checked?
Regular inspections are essential:
- EN 15154 requires routine testing for flow, activation, and cleanliness.
- Checks should also occur after maintenance work, power outages, or incidents.
- Logs must include verification of water temperature, pressure, drainage, and any connected alarms or lights.
What Are the Alternatives?
Eyewash Units:
Used for rinsing eyes after chemical contact. Available as:
- Portable units
- Fixed plumbed-in units
Usually feature gentle sprays aimed at both eyes simultaneously.
Combination Showers:
Integrate an emergency shower with an eyewash station—ideal for environments with multiple exposure risks.
Overhead Tank Showers:
Gravity-fed units with onboard tanks (e.g. 1600 litres). Useful in remote or undeveloped sites. These often come with heating/cooling to maintain compliant water temperature.
Final Thoughts
Safety showers are a cornerstone of industrial and lab safety protocols. To ensure they work effectively when needed:
- Choose systems that meet EN and ANSI standards
- Install them in accessible locations
- Perform regular checks
- Consider supplementary units like eyewash stations or tank showers where relevant
