Duo tap mixer to single tap, how easy?

Question

I would like to swap my bathroom basin that have duo taps, so a basin with a single tap. Before I buy a basin and look for fitters, is there anything I need to know beforehand? Is it something easy that can be done? Thanks

Martin · Accepted Answer

Hi lauren! It’s usually a straightforward job if your pipework’s already set up for it. Most mixer taps just need the old individual hot & cold taps removing, then the mixer connects to the same pipes with flexi hoses.

Main thing to check is if there’s enough space and good water pressure on both sides – but 9 times out of 10, it's an easy switch.

Mark · Answer

A potential issue is that occasionally hot and cold water supplies to a bathroom sink can be of different pressures. For example, hot from a gravity system and cold from the mains.  While this doesn't cause an issue with separate taps, it can with a mixer tap as the mains will always 'override' the hot and it can be difficult to obtain a satisfactory 'mix to achieve the required temperature. This is not a common problem but is commonly overlooked. A competent plumber should check this and advise on the problem and explain the consequences. The other more common issue is the footprint of the new sink. If it's a pedestal type, sometimes the new pedestal can be smaller than the old. If the finished floor is not laid under the pedestal this can sometimes leave exposed floorboards or sub floor showing. Try to ensure the new pedestal is larger than the old if possible. The same applies to sinks with a cabinet below. The swap over of sinks is usually a straight forward job.

Dan · Answer

es, It Can Be Done — But Here's What to Consider:
1. Water Pipe Compatibility (Hot and Cold Supply):
A monobloc tap needs both hot and cold feeds brought to the same tap — usually via flexible hoses that connect under the sink.

If your existing pipework brings hot and cold separately to either side of the old basin, you may need to re-route the pipes or use longer flexi tails to reach the new tap.

2. Water Pressure Balance:
If you’re on a gravity-fed system (which it sounds like you are), hot water pressure is likely much lower than cold (mains pressure).

Mixer taps can struggle or work poorly when hot and cold pressures are unbalanced.

You may need a tap designed for low pressure or install a pump (or convert to an unvented cylinder as discussed earlier).

Look for taps that are rated for 0.1 – 0.2 bar if you’re staying with low pressure.

3. Basin Tap Hole Type:
Your new basin should have one central tap hole, not two.

Most modern basins come with one, but double-check to avoid mismatches.

4. Waste Position and Fit:
Swapping the basin might also mean repositioning the waste pipe slightly depending on the shape and size of the new sink.

Make sure the new basin’s waste outlet lines up or can be adapted easily.

5. Fitting Considerations:
It's a relatively straightforward job for a plumber or competent DIYer:

Remove old taps and basin

Fit new basin and secure

Connect hot and cold via flexi hoses to mixer

Check for leaks, adjust pipework if needed

A basin and mixer tap swap is typically a half-day job for a fitter, assuming no complications.

Gheorghe Claudiu · Answer

It is pretty straight forward for a plumber. If you want to do it yourself, keep in mind  that they basin must be fixed to the wall properly. Put an isolation valve on each pile and the connect the flexible connectors. Good luck!

Farhan · Answer

If it’s new basin with new tap then it shouldn’t be a problem just measure the size of the basin unless different size height etc isn’t an issue 
Thanks

Ionut · Answer

it's not that hard, some modifications need to be made but it can be done

Kai · Answer

This should be easy as a single tap has a built in mixer so both hot and cold water feeds attach to the one tap.

John · Answer

Good morning. This is a pretty straight forward job. The new basin will need to have the single hole in the middle. The new mixer tap will still come with 2 feeds. One for the hot and one for the cold.

Mick · Answer

So long as you purchase a single hole basin, and virtually all  single taps, with hot and cold combined, will fit, you might need pipework changed but that's a job forever installs it.
Regards
Michael winsor

Nathan · Answer

Your need to look for a single holed basin. I suggest you get a plumber to install it & also I would recommend changing the isolation valves under the basin

Duo tap mixer to single tap, how easy?

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