Rust can accumulate in water pipes. Testing eyewashes ensure clean water is available in an emergency. Flush test your eyewashes on a monthly basis by slowly pushing the handle away from you until water is flowing freely and you see that the stream(s) will be able to effectively rinse your eyes. Let it run for 15 seconds. Mark the eyewash tag with your initials and the date; including the year. For eyewashes that do not have plumbed drains, use a small basin capable of holding the drained water while flush testing the eyewash for 15 seconds. All eyewashes, whether they have a drain or not, need to be tested every month.