We recently had a blocked sink which after the usual checking pipework under the sink, we realised was a blockage in the outside drain run. We rodded it and absolutely loads of black gunk was freed and the sink started to flow. We continued to rod the drain until there was no resistance and the water was running clear. Once the drain felt clear and we thought the job was done, the sink was blocked again!
The sink waste pipe drops into the ground then runs for a couple of foot at an angle into the drain we rodded. I'm pretty sure that in clearing the main 12ft drain run, we've pushed some of the gunk into this 2 ft branch section which we can't get to with the rods. There isn't any access from the other end as none of the kitchen waste pipes are visible from the outside of the house.
I've tried lots of soda crystals and boiling water, plunging etc. but having seen the gunk we cleared from the main drain run which had the consistency of mud, I can't see it shifting it.
Any ideas how I can shift this tricky section?
The sink waste pipe drops into the ground then runs for a couple of foot at an angle into the drain we rodded. I'm pretty sure that in clearing the main 12ft drain run, we've pushed some of the gunk into this 2 ft branch section which we can't get to with the rods. There isn't any access from the other end as none of the kitchen waste pipes are visible from the outside of the house.
I've tried lots of soda crystals and boiling water, plunging etc. but having seen the gunk we cleared from the main drain run which had the consistency of mud, I can't see it shifting it.
Any ideas how I can shift this tricky section?