"Graham." wrote in message
...
"Rod Speed" Wrote in message:


"Marland" wrote in message
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Richard Tobin wrote:
Behind a panel in my house is the exposed end of a long-disused waste
pipe - quite likely there was once a sink there - which I suspect of
being the source of an occasional bad smell.

Presumably I should cap it, but as you can see from this photo it's
not a neat end:

http://www.cogsci.ed.ac.uk/~richard/pipe-end.jpg

The outside diameter is about 7cm.

There are flexible rubber caps for sale, e.g.

https://www.amazon.co.uk/Cloverleaf-...dp/B078HHNFHS/

but I doubt it could be attached securely. Would a piece of some kind
of flexible rubber sheet and a jubilee clip do the trick?

Reasonable quality plastic bag and a cable tie would do it just as well.

Nope, plastic bags don?t last long.

Polythene bags last a long long time,

No they don't. They break up into small pieces surprisingly
quickly even when kept inside the house out of the light.

that's why we have biodegradable and compostable ones.

Nope, that's a different issue, how long it takes for
the small pieces to stop being small pieces of plastic.