Recently moved into a 1950's bungalow to discover a rainwater drain is badly blocked. (Appears to have been blocked for years and years).
I rodded the drain from the manhole on the driveway (10m away) and removed a bucket load of roots, but the bend towards the gully is too sharp to get the rods around. I reached down into the gully to remove all of the impacted soil and roots within reach - it isn't possible to rod from here.
I have tried a high pressure drain hose in an attempt to blast things clear, but to no avail.
Digging down with a view to replacing the damaged section of drain only to find concrete covering the drain pipes. The gully is approx 35cm deep so expect the drainpipes to be a little shallower after the trap
Question:
Is this concrete part of a raft foundation and if so, should I carefully break up the concrete to get at the old pipes and replace with plastic?
Or should I investigate a difference method of replacing the damage drainage?
Many thanks