What to Consider When Choosing an Emergency Shower and Eyewash Station

Workplace safety is essential in environments with hazardous chemicals or materials that may cause burns or eye injuries. Choosing the right emergency shower and eyewash station is a key part of any safety plan.

Understand Applicable Standards and Regulations

Before evaluating specific models or brands, familiarize yourself with the standards and regulations that govern emergency showers and eyewash stations. In many countries, these key standards apply:

• ANSI/ISEA Z358.1 (United States): Specifies performance and installation requirements for emergency eyewashes, showers, and combination units.
• EN 15154 (Europe): Defines requirements for safety showers and eyewashes in European countries.
• OSHA (Occupational Safety and Health Administration, U.S.): Requires employers to provide quick access to suitable facilities for flushing eyes and body to remove harmful substances. While OSHA does not specify technical details, it references ANSI Z358.1.

Key points to note:

1. Flow Rate & Duration: Under ANSI Z358.1, an eyewash must deliver at least 0.4 gallons per minute (GPM) for 15 minutes, and a shower must deliver at least 20 GPM (75.7 L/min) for 15 minutes.
2. Temperature Requirements: Water delivered to the eyewash or shower should be tepid-ideally between 60°F (16°C) and 100°F (38°C). This helps prevent shock from water that's too hot or too cold.
3. Activation & Accessibility: Actuation controls must be hands-free (e.g., push arms or foot pedals) and fixtures must be accessible within a 10-second walk (approximately 55 feet or 16.8 meters) from hazard areas, without obstructions or doorways.

Types of Emergency Showers and Eyewash Stations

Key Selection Criteria

When evaluating different models or configurations, consider the following factors:

Location & Accessibility

• Proximity to Hazardous Areas: Install fixtures within a 10-second walk of potential chemical exposure points.
• Clear Pathways: Ensure unobstructed access-avoid placing behind doors, equipment, or in narrow corridors.
• Visibility: Use brightly colored signs (typically green with white pictograms) and ensure the station is well-lit. Some sites add overhead shower signs or even flashing beacons in high-risk areas.

Water Temperature Control

• Tepid Water Requirement: If you install a plumbed unit, incorporate a mixing valve or temperature-control device. Without a mixing valve, water from the hot side could scald, and cold water could induce hypothermia or discourage use.
• Freeze Protection (Cold Climates): For outdoor or unheated locations, consider freeze-resistant, self-contained units or insulated piping to maintain operable water flow.

Flow Rate & Duration

• Eyewash Stations: Must deliver at least 0.4 GPM (1.5 L/min) for a minimum of 15 minutes; spray pattern should cover both eyes simultaneously with low-impact flow (no more than 30–60 PSI at the nozzle).
• Emergency Showers: Must provide 20 GPM (75.7 L/min) for at least 15 minutes; showerhead should deliver a uniform 20-inch diameter spray pattern.
• Testing & Maintenance: Look for units with flow indicators or test tags to document weekly activation and annual inspections.

Source of Water Supply

• Plumbed Units: Rely on building water supply; best for permanent installations with reliable pressurized water.
• Self-Contained Units: Ideal where plumbing is absent or unreliable-cab be installed rapidly, but require routine checks to verify tank level and pressure.
• Portable Units (Gravity-Fed): Suitable for small labs or temporary workstations but may not satisfy a full 15-minute flush, depending on tank size.

Space & Infrastructure Constraints

• Ceiling Height & Floor Space: Combination units need sufficient vertical clearance (usually 7–8 feet from the floor to the showerhead). Ensure floor drainage or anti-slip flooring underneath.
• Retrofitting Existing Facilities: If adding to an older building, assess whether plumbing supply lines and waste drains can be extended without excessive renovation costs.

Maintenance Requirements

• Weekly Activation Tests: Plumbed units should be "activated" weekly to clear debris and verify flow, per ANSI Z358.1.
• Annual Inspection: Documented inspection must verify water flow, temperature, and general functionality; ensure any worn components (valves, nozzles, mixing cartridges) get replaced.
• Consumables & Replacement Parts: Check the availability of replacement heads, filters, and mixing-valve cartridges. Some manufacturers offer service plans that include periodic maintenance.

Cost Considerations

• Upfront vs. Long-Term: Plumbed units may cost more initially (due to piping and installation labor), but lower ongoing maintenance compared to self-contained models. Conversely, self-contained units often have higher unit costs and require periodic tank refills or cartridge replacements, which add to lifecycle costs.
• Budget for Accessories: Plan for signage, floor drainage solutions, foot pedals (for hands-free operation), and protective covers (to keep nozzles clean).

Special Features & Add-ons

Some models offer additional features that may be beneficial depending on your environment:

1. Heated Water Supply or Tank Heaters – For areas prone to freezing, integrated electric tank heaters (for self-contained units) or inline water heaters (for plumbed units) maintain tepid temperature.
2. Freeze-Resistant Valves and Piping – Use self-draining or freeze-resistant valves for outdoor or uninsulated locations.
3. Push-Plate vs. Pull-Handle Activation – Pull-handles are standard, but push-plate (foot-operated) or knee-operated activation can keep hands free in an emergency.
4. Audit-Ready Test Stations – Some manufacturers supply flow-rate monitoring devices or integrated temperature gauges to simplify compliance documentation.
5. Protective Covers/Caps – Plastic covers (often flip-down) keep nozzles clean and prevent accidental activation. In dusty or corrosive environments, these can be vital.

Installation Best Practices

Once you've chosen the appropriate unit type, follow these guidelines to ensure a safe and compliant installation.

Positioning:

• Eyewash Spouts: No higher than 69 inches (175 cm) and no lower than 33 inches (84 cm) from the floor.
• Showerhead Height: No lower than 82 inches (208 cm) above the floor; ideally centered over the user's head.

Drainage & Splash Control:

• Consider installing a trench drain or catch basin beneath the shower/eyewash to handle the 20+ GPM flow without flooding.
• Use a splash guard or grate to reduce slippery floor hazards.

Signage & Lighting

• Mount a highly visible sign above or next to the station-ANSI-compliant pictograms are recommended.
• If ambient lighting is poor, install dedicated lighting fixtures or an illuminated sign so the station is easy to locate in low-light conditions or during power outages.

Clearance & Walkways:

• Maintain a minimum 34 inches (86 cm) of clear space in front of the station for easy access.
• Do not place wheel chocks, storage racks, or machinery within the required 10-second travel path.

Water Supply & Pressure Checks:

• Verify that incoming water pressure meets the manufacturer's specifications-eyewashes generally require 30–60 PSI; showers need sufficient volume for 20 GPM.
• Install a balanced-pressure mixing valve (if needed) and label the valve access for maintenance personnel.

Electrical & Temperature Controls (if required):

• If using a tank heater or tempering unit, follow local electrical codes and install a ground-fault circuit interrupter (GFCI) if required.
• Ensure that temperature-control devices are accessible for calibration or service.

Maintenance and Training

Proper training and routine maintenance are as important as choosing the right equipment. Consider the following steps.

Establish a Written Program:

• Document weekly activation procedures, including date, time, inspector's initials, and any deficiencies found.
• Keep records readily available for internal audits or regulatory inspections.

Train Employees:

• Conduct periodic drills so employees know the location of stations and how to activate them quickly.
• Emphasize that rinsing should start immediately upon exposure to caustic substances-every second counts.

Scheduled Inspections:

• Weekly Check: Activate each station for at least 3 seconds to verify flow and clear debris. Record results.
• Monthly/Quarterly Checks: Inspect signage, ensure no obstructions in the travel path, and verify temperature.
• Annual Inspection: Perform a full functional test for 15 minutes, measure flow rates (eyewash: ≥0.4 GPM; shower: ≥20 GPM), and verify temperature remains within 60°F–100°F.

Parts Replacement & Service Contracts:

• Replace nozzles, filter screens, and plumbing seals as recommended by the manufacturer (often every 6–12 months).
• Consider a service contract with a certified technician who can handle annual calibration of mixing valves and mechanical components.

Examples

Chemical Manufacturing Plant

• Hazard Profile: Multiple corrosive acids and bases used in large vats.
• Solution: Plumbed combination emergency shower and eyewash station with mixing valve, installed at each major processing area. An integrated pan/foot pedal activation and heated-water tempering unit ensure compliance year-round. Stations include protective covers to prevent contamination from dust.
• Rationale: High-volume hazards demand reliable, always-available water supply; heated mixing valve prevents temperature shocks; combination unit saves floor space.

Remote Field Research Facility

• Hazard Profile: Occasional use of solvents for sample cleaning; no permanent plumbing in the remote cabin.
• Solution: Self-contained, pressurized eyewash station (15-minute capacity) and a portable gravity-fed shower with a 50-gallon insulated tank. Both units are stored indoors and placed near the cabin door when chemicals are in use.
• Rationale: Lack of plumbing requires self-contained solutions; tank heaters in the shower unit maintain tepid water. Weekly checks ensure tank remains full and pressurization is within operational parameters.

Final Checklist Before Purchase

• Standards Compliance: Verify model meets ANSI/ISEA Z358.1 (or applicable local standard).
• Flow & Duration: Eyewash ≥0.4 GPM for 15 minutes; shower ≥20 GPM for 15 minutes.
• Water Temperature Control: Mixing valve or tank heater to maintain 60°F–100°F.
• Accessibility & Location: Within 10-second walk, no obstructions, proper mounting height.
• Activation Method: Hands-free operation (push plate, foot pedal, knee lever, or push handle that stays open without continuous hand force).
• Maintenance & Documentation: Ease of weekly activation test, availability of test tags, clear maintenance instructions.
• Protective Covers & Signage: Included or available as accessories.
• Installation Requirements: Check water pressure, plumbing modifications, drainage, electrical wiring for heated units.
• Warranty & Support: Manufacturer's warranty length, availability of technical support, and spare parts.

Conclusion

Selecting the right emergency shower and eyewash station is more than choosing a model off the shelf. It requires thorough evaluation of your facility's hazards, plumbing and infrastructure, local standards, and budget constraints. By following ANSI/ISEA Z358.1 (or your region's equivalent), adhering to flow and temperature requirements, ensuring quick access, and establishing a robust maintenance program, you'll greatly improve the safety and well-being of anyone exposed to potentially harmful substances. Investing time in proper selection and installation today can prevent serious injuries and ensure regulatory compliance for years to come.