since my husband has installed the new bathtub, the water is brown when we first turn on the hot water and we just don't know why. it is starting to stain my new tub and we can't add water to the tub when the kids are in the bath and it starts to get cold. this is starting to become a huge aggrivation for me. does anyone have any suggestions. it only lasts for a few seconds, but it also happens when you turn the shower off. HELP PLEASE