I've installed my favorite showerhead, so it hasn't been used at home. However, I believe water was run through it once to check the water flow, etc., upon moving in. Please consider this only if you understand. This circular showerhead with comfort water function provides a comfortable shower experience. - Brand: TOTO - Product Name: Showerhead - Instruction Manual: Included - Design: Circular head, white - Function: Comfort water function Thank you for looking.