I have a backed up shower and toilet. I used drano and a 25 foot snake down the shower drain and the water goes down at first but after about 5 min of the water running it gets backed up and water comes up when the shower is not being used also.

Hi Chunk...

Is this toilet/shower on 1st floor? Are these the lowest fixtures in the house? In other words, is there a washing machine or sink downstairs in cellar.. or is this bathroom in the basement?

How many stories to your house? Is roof sharp angle? Finally, how many bathrooms in the house?

Let me know answers to all questions if possible...

Thanks...

MARK