Loose Mixer Tap - How to tighten?

16 Feb 2009
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United Kingdom
Evening all.

The mixer tap on one of our bathroom sinks is loose - when you turn either of the taps on/off the mixer unit swivels.

I've had a look at the bottom of the mixer from underneath the sink and I can see some sort of retaining clip and what looks like a nut.

Problem is there's hardly any room to work under the sink (it's in a unit) - for instance there's no way to get a spanner up to it.

I'm not sure what tool I need, nor what I actually need to adjust/tighten the mixer unit.

Is it just the nut that needs tightening or something else? Any advice on what tool to use?

Pic below.

Thanks as always.

View media item 48497
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Got the spanner set.

Damn bolt is bigger than the spammers go up to - id say it's a 14 or 15mm bolt now I've tried these.

Gotta order a bigger one from eBay. :(

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