On Mon, 09 Jan 2006 22:51:11 GMT, a particular chimpanzee named
"Brian" randomly hit the keyboard and produced:

Wrong! It depend on how old the drains are. If they are more than a
certain age then the local council WILL cover the cost even on private
property.

Pre-1937, any drain serving more than one property is a de-facto
public sewer. However, the OP mentioned that his house is a 1970's,
therefore I was correct.
--
Hugo Nebula
"If no-one on the internet wants a piece of this,
just how far from the pack have you strayed?"