We operate a 4000 PSI ( 275 Bar ) / 12 gallons a minute high pressure water jetter which is about the optimum combination of pressure and flow for 95% of drains in use today.
For smaller pipes we carry a variety of rods and sanisnakes.
It is not often we get beaten by a problem although if it does happen it is usually due to a bigger problem such as collapsed or defective pipes.
If we suspect damage to the pipes we can carry out a CCTV survey and produce a DVD record.