In the master bathroom we have a stand-up shower and an adjacent bathtub. When taking a shower the water begins to back up and overflow the shower, then it will slowly drain. Also, after using the bathtub and draining the water, the shower again backs up and overflows into the bathroom and leaves a gray deposit of some type. We have used a snake in the stand up shower and nothing happened. We also tried the snake in the drain opening pipe outside the house and nothing came out. Should I try running the snake down the vent above the bathroom? Any other suggestions on what I could do to solve this problem?
Thanks, Jason