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® Safety Showers & Eyewash products ANSI Z358.1 2014 KEY POINTS


Waste Disposal: Proper disposal of the contaminated water must be considered when installing new equipment. Drainage, freezing temperatures and pollutants, should be considered. We recommend that you consult your Local Authority, Water provider or Environment Agency for additional guidance on the correct wastewater disposal method for your site.


Water Temperature & Tepid Water: Tepid water is crucial, but often overlooked when providing compliant eyewash and drench shower stations. The ANSI standard specifically mentions the delivery of tepid water and defines it as “A flushing fluid temperature conducive to promoting a minimum 15 minute irrigation period, the suitable temperature range is 16°C - 38°C (60°F - 100°F)”. Medical professionals recommend that tepid water be used to treat chemically injuries to eyes and body tissue because temperatures that exceed 38°C (100°F) can enhance chemical interaction with the eyes and skin. Additionally, flushing liquid temperatures below 16°C (60°F) can cause hypothermic shock. The standard further states that while cooler flushing fluids may provide immediate relief after chemical contact, prolonged exposure to cold fluids affect the ability to maintain adequate body temperature and can result in the premature cessation of first aid treatment. Tepid water can be delivered to emergency eyewash and showers in different ways, the most common is to install a thermostatic mixing valve or water tempering valve to blend hot and cold water and provide a temperature within the range defined. These valves should include a hot water shut-off to prevent accidental scalding, and a cold- water bypass to ensure the delivery of flushing liquids in the event that the hot water supply fails. It’s also important to note that standard water mixing valves should not be used. Most facilities located in the UK have outside temperatures that can drop to below 0°C (32°F) during the winter, therefore emergency stations that can be exposed to freezing temperatures need protection, the standards state that “Where the possibility of freezing conditions exists, equipment shall be protected from freezing or freeze-protected equipment shall be installed”. Conversely locations where the ambient water temperature can exceed 37°C (98.6°F) will require anti-scald valves to purge potentially scalding water from the feed lines. This will include outdoor locations that are exposed to direct sunlight, or indoor locations exposed to extremes of temperature created by a manufacturing process.


Training: All employees who may be exposed to hazardous or corrosive materials must know the locations of, and be instructed in the proper use of the eyewash and/or drench shower equipment on site; in addition, site plans showing the exact locations of all emergency stations should be freely available to anyone entering the site.


Maintenance & Testing: Planned maintenance is necessary to ensure that all emergency equipment is functioning safely and correctly. Weekly testing will ensure the supply lines are clear of sediment and bacteria build-up that can occur in stagnant water. The standards state that plumbed equipment, “shall be activated weekly for a period long enough to verify operation and ensure that flushing fluid is available” and portable and self-contained equipment “be visually checked to determine if flushing fluid needs to be changed or supplemented”.


Personal Wash Units/Bottled Eyewash: Bottled eyewash and/or other personal wash units such as single head drench hoses are considered to be supplemental equipment only. These types of units do not meet the ANSI requirements (“A personal wash unit may be kept in the immediate vicinity of employees working in a potentially hazardous area. The main purpose of these units is to supply immediate flushing. With this accomplished, the injured individual should then proceed to a plumbed or self-contained eyewash and flush the eyes for the required 15-minute period”) and should not be used as an alternative to a 15 minute emergency flushing station.


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