Clive George wrote:
"Exhausted" wrote in message
...

trouble is the fat appears to be at the top of the ubend, so access from
the man hole end will not touch it(i.e just below the pipe, and from the
drain end its quite a route through caustic soda,

Heat is good.

Getting rid of all that caustic soda is another good idea - shoving 1KG of
it in there was a _really_ bad idea, but with any luck you know that now.

just dilute in in gallons of water once the drain is clear.