Got a call the other night two rental cabins, they've been there for thirty years the drains to the septic tie together some where? Cleanout on the outside of one and a cleanout 35' away down a steep embankment. Both cleanouts put in a year or to. Anyways pipes full Il to first cabins toilet brim and inchs from top of first cleanout. 2 nd cleanout no water there is 18" of snow coverage and everythings landscaped so 830 pm I go up with trouble lights and k 60 get out 50' still no sign in second cleanout so retrieve and put on another bit go out 70' still no sign retired plumber comes out that put second cleanout in years ago and insures me he flushed water and watched it run buy. Hit blockage around 50' with saw bit and can't get past it. Today bring out k 750 same thing hit blockage at 50' but with small bulb head go 75'. Water level doesn't change and it comes back with some black hair but nothing redicalous anyways the only thing I can think is that I'm go past a t or she that heads to the septic tank and going towards a old sess pit any ideas how can I go 75' if their tied together and the cleanouts are only 35' apart. Thanks seanny.