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Eyewash/Drench Hose Units:
ANSI Standard Z358.1-2009 states that drench hose units may supplement, but may not be used in place of, dedicated eyewash units. Guardian offers a series of units that meet the provisions of the ANSI standard as both an eyewash and a drench hose. These dual purpose units can be used to combine an eyewash and a drench hose into a single versatile, economic unit. To use the unit as a fixed eyewash, simply leave the unit in the
holder. The dual spray heads will deliver water to both eyes simultaneously. To function as a drench hose, remove the unit from the holder and rinse any part of the eyes, face or body. These units are particularly useful in areas (such as laboratories) where workers are handling relatively small quantities of injurious materials. However, should a spill occur, it might affect any part of the worker’s eyes, face or body. Eyewash/drench hose units offer a degree
of versatility not found with other types of emergency equipment.
Install eyewash/drench hose unit within 10 seconds (approximately 55 feet) of hazard, on same level as hazard and with unobstructed travel path. (Section 5.4.2; B5)
Identify eyewash/drench hose unit with highly visible sign. Area around unit shall be well lighted. (Sections 5.4.3 and 184.108.40.206)
Water delivered by eyewash/drench hose units shall be tepid (60-100ºF). (Sections 5.4.6 and 220.127.116.11)
Instruct all employees in the location and proper use of eyewash/drench hose units. (Sections 5.5.4 and 18.104.22.168)
Activate eyewash/drench hose units at least weekly. (Sections 5.5.2 and 22.214.171.124) Inspect annually for compliance with standard. (Section 5.5.5 and 126.96.36.199)
Drench Hose Units:
Under ANSI Z358.1-2009, drench hose units support plumbed and self-contained emergency eyewash and shower stations, but cannot replace them. In other words, drench hoses are intended solely as supplemental units providing additional protection to personnel. Drench hoses are useful in cases where the user is in a prone position or where it is necessary to reach areas of the face and body inaccessible to the fixed stream of a shower or eyewash unit. They are also advantageous in areas (such as laboratories)
where they can be installed close to where accidents might occur.
This type of equipment is usually considered to be secondary to proper emergency showers and eyewash stations (e.g., having a drench hose does not replace the need for showers/stations). Drench hoses may be used to "spot" rinse an area when a full shower is not required, to assist a victim when the victim is unable to stand or is unconscious, or to wash under a piece of clothing before the clothing is removed.
Q: Under what circumstances would you recommend the installation of a scald valve on a drench shower or combination fixture?
A: Scald valves are recommended for warm climates where ambient temperature regularly reaches 85°F /30°C and above for any length of time. The scald valve is activated when the water in the pipes reaches temperatures of 85°F /30°C and above. The valve opens and expels the hot water from the unit.
Q: Why is it important to consider installing drains whenever possible?
A: ANSI Z358.1 compliant drench showers feature a stay-open ball valve that allows the shower to flow at a minimum of 20 gallons of water per minute. A person is to remain under the drench shower for 15 minutes, which equates to at least 300 gallons of water that may collect and spread. Drains prevent water damage and minimize slip hazards. Alarm systems may serve as a strong deterrent to vandals, and will minimize the amount of water damage, should there be a false activation.
Q: How does an Emergency Fixture drench shower differ from a standard household shower?
A: A standard household shower releases a maximum of 3gpm. Per ANSI Z358.1, a compliant safety drench shower must release a minimum of 20gpm. The high volume of water is intended to dilute and completely flush the hazardous material off the body. (4.1.4.)
Q: I would like to test my drench showers, do you have anything to minimize the spray?
A: The drench shower tester (S19-330ST) is typically used when activating the drench showers for testing purposes. See the technical data sheet on www.bradleycorp.com for details.
Q: I have a drench shower and would like to attach a single head drench hose, can the drench hose also be used as an eye/face wash?
A: No. The single head drench hose is intended as a body wash only.
Q: I have a barrier-free fixture, and would like to attach a foot treadle kit, in addition to the paddle activtion handle. Would the fixture still be considered barrier-free with this addition?
A: No, a foot treadle kit should not be installed on a barrier-free fixture.
Q: I have a barrier-free fixture and wish to purchase the S45-2396, stainless steel retrofit dust cover kit. Will the fixture still be considered barrier-free?
A: Yes. The fixture will still be considered barrier-free. The user merely needs to push against the stainless steel handle, which requires less than 5lbs of force, and the dust cover will pop open, and activate the fixture.
Q: Does a single head drench hose qualify as an eyewash under ANSI Z358.1-2004?
A: Drench hoses are available with a single sprayhead or dual sprayheads. Per ANSI Z358.1, drench hoses with a single sprayhead do not meet all the criteria of an eyewash because they do not have dual spray heads for flushing both eyes simultaneously. Compliant drench hoses with dual spray heads feature a stay-open ball valve and allow the hands to remain free to help open the eye lids. (8.2.1)
Q: Can a drench hose be substituted for a drench shower?
A: A drench hose is a supplemental device only. It will not satisfy OSHA or ANSI's requirement of a 20gpm and a 15 minute full body drench.
Q: How does one choose a back flow preventer for a drench hose?
A: Local codes and ordinances govern what type of backflow preventer is required. Bradley offers three models. See their technical data sheets for more information. Consult the local authority having jurisdiction for proper compliance to codes in your area. (S27-303, S45-2309, S45-2310)
Q: What is the part number for an under-counter hose guide bracket for hand-held drench hoses?
A: The hose guide bracket is part number 140-226.