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Hello. I am a retired plumber of 45 years. I instructed all of my guy’s to do whatever is necessary to get the job done. Booties, mask or whatever made the customer feel safe, within reason of course. I never had any of them complain. So, by all means yes, ask them to make you feel safe. A good person will comply with no issue’s. Good luck. Sorry for the delayed answer. I just got the post.