I just love a challenge And people would come in and have these plumbing or electrical issues And nobody has all the answers in life but to offer them options of what they can to solve their problems For example in the country your waste water is a septic tank and when there heavy rains the grounds absorb the water so the tanks are a three stage systems the basic toilet water the poop islittle by little is broken down to liquid but the ground so wet the water has nowhere to go except for going back where it comes from Which the bathtub that the first to show there a problem when you flush the toilet it start coming up the bottom of the tub But there an easy way to solve tgat It called a one way valve the flow goes through a little flapper and then the flapper closes up to prevent anything to come back up through the waste water black pipe