You use it during the shower.
A shower proves vital in a laboratory room, especially when an emergency occurs. If one were to be improperly exposed to certain chemicals , they could shower them off. If chemicals get into one's eyes, a shower can flush the them out.
Depends what shower you have.
yes
Yes, the waterproof can light is suitable for use in the shower.
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Yes
30 inches
Use the safety shower if corrosive or irritating chemicals splash extensively on you or your clothing.
In the shower, bath tub or even when you wash your hands.
depends on how much you want, like i have 700 gallons.
the shower might be turned the wrong way so they can't use it or something could be blocking the shower the path to the shower.