In an earlier contribution to this discussion,
Adrian wrote:


He came. He went.

There's another manhole cover in the front garden somewhere, under a
layer of earth. And snow.

That's my morning sorted, then he'll come back.

Turns out some neighbours (asked 'em when they dropped an Xmas card
in) "upstream" have also had all sorts of gurgling and overflowing,
too.

Deep, deep joy.

Indeed - blockages will always be felt upstream.

The trick is to find the first point *downstream* which *isn't* blocked, and
then rod in an upstream direction from that point. If you try to rod from
one that's full, you can't see where the outlets are - particularly if it's
deep (mine are all 2 metres or more!)
--
Cheers,
Roger
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