Basin mixer width

5 Jan 2008
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United Kingdom
Hi all.
I have a basin with a separate hot and cold taps. My partner has asked to replace this with a mixer. The easiest thing to do would be to replace the basin, however I am trying to keep the costs low.

Will a bath mixer fit the spacing on a basin (I think all bath mixers have 18cm pipe centre to centre). I roughly estimated the basin to be 20cm, can't be accurate until the old taps are off.

Any ideas?
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1. Bath mixers normally have 3/4" BSP threaded shanks. They will probably not fit through the holes in the basin, which normally have holes for 1/2" BSP threaded shanks.
2. For the reasons given above, you would have to change the pipework under the basin.
3. Not all bath mixers have 180 mm centres. Most "deck" mixers do, but they relay on a dead flat surface between the basin holes to make a seal. Unless the surface is dead flat you would need the sort with a riser at each end - and they would, in my opinion, be overly tall for a basin.
4. Provided the existing taps are circular, you can gauge their centre distance as follows:
4a. Measure across the outside of the two taps. Call it "a"
4b. Measure across the inside of the two taps. Call it "b"
4c. The centre distance should be (a - ((a-b)/2))
5. On the whole, I'd say you are on a hiding to nothing!

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