John wrote:
The chrome has got in a bad condition (after 20 years) on my wash
basin drain (plug hole) and I would like to replace it. However,
access to the nut underneath is very poor due to the hot and cold
pipes, the pedestal and the wall all being in the way somewhat.
I was wondering if I might stand a chance of unscrewing it from the
top by turning the grille - it is solid brass. Any thoughts? I had
thought of trying to hit the nut with a screwdriver to get it to turn
- but the basin is near a corner so access on the correct side for
undoing is restricted.

It's often possible to do that with a home made tool.

Piece of timber with two screws driven into one side, spaced so they fit
into the gaps in the grill. Wind some tape around the whole thing to avoid
scratches.

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WD40 sprayed on the nut will help.

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Dave - The Medway Handyman
www.medwayhandyman.co.uk