I'm just laying some new drains,and I have notified building control,there are two chambers,the 250mm Osma kind,and I was wondering about the practicality of rodding such a small chamber-nothing was said by the b.c. officer-is there meant to be a seperate rodding eye connected to one of the side branches on the chamber-I have a feeling I've seen it done like that.Bit out of my comfort zone!