Struggled for hours trying to use various specialised basin wrenches. None worked because the shape of the (smallish) basin prevented turning of the wrench.
Here are some tips which I hope may help others.
A special box spanner is sold for the purpose. It is made by Monument but also sold under other brand names. It is widely available from plumbers merchants and internet tool/plumbing suppliers. Cost (Feb
2004) about 5 pounds + vat.Known as a Monument 323 or MON323 or 323F - Tap back nut box spanner For an illustration, try searching via Google or at the following website
On another occasion I had a problem with back nuts embedded in (rock hard) putty. I dealt with it by painstakingly scraping the putty away with a scalpel type knife. Another suggested method is to put a drill bit in a small cordless electric screwdriver, and drill the putty away
- taking care to avoid damage to the bath or basin.