Function is just as important as style when choosing your bathroom 
sink fixtures. Even if you do not remodel your bathroom, changing the 
sink faucet and handles can sometimes make your bathroom more 
functional.
Faucet Centers
Believe it or not, there is something of a science behind choosing 
the right sink faucet.  The first thing to do is measure your faucet 
centers. Sinks come with premade holes for the faucet and handles, and 
with different spacing between holes.
A single-hole faucet is needed for a sink with 1 hole. Usually these 
are lever type faucets. The advantage of these faucets is that they take
 up very little room, so you can use them with a smaller sink in a 
smaller bathroom.

It is also easier to use by children and makes it 
harder for them to scald themselves by because there is no hot water tap
 by itself. A single lever faucet is also easier for older people or 
people with arthritis to use.
They can be a little more fragile and 
often the entire faucet needs to be replaced if it breaks. The 
disadvantage is they have a modern look that is not in keeping with 
traditionally styled bathrooms.  A variation on this faucet is the 
vessel faucet, which is a tall faucet designed to accommodate the height
 of vessel sinks.

Center-set faucets have the faucet and 2 handles mounted onto a single
 base. They can be used on sinks with 1 hole and sometimes 3 holes. 
These are the most difficult for people with arthritis to use, and they 
are difficult to clean because the handles are so close to the faucet. 
But this is a very common style.
The widespread faucet has 2 handles set off from the main faucet, It 
is easier to get hot water only out of. And it has a more traditional 
look but you can also find very sleep, contemporary widespread faucets. 
Crossbar handles are the most traditional of all and are found in period
 baths.

There are also wall mount faucets, which are rarely used except in 
high-end bathrooms. They require a special plumbing set up. Electronic 
touch faucets are used mainly in commercial settings. You might want a 
goose
neck style faucet. Do you dye your hair? Consider getting a faucet 
with a spray nozzle.
Height
Think about how you use a sink. If you like to fill a glass with 
water, your facet has to be high enough to do that. Many bath sinks are 
shorter to prevent splash out. You will also want a higher faucet if you
 wash your face at the sink.
 
Materials and Construction
Faucets can be built based on one of several principles. Compression 
faucets rely on washers to manage the water flow. This is the 
conventional way to make a faucet. You do have to clean the screen every
 so often.
Newer faucets use balls, cartridges, and disks. They are 
easier to operate and maintain, bur the plastic parts used in most of 
these faucets mean they are very durable. Cartridge faucets have a 
cartridge flow mechanic that can be replaced if there is a leak. Faucets
 with a pair of ceramic disks are the most durable and trouble-free, but
 they can also be the most expensive.
 
Pricing
Pricing can be anywhere from $20 up to $1,000 or more for a 
solid-brass faucet set with designer styling. Remember that leaks waster
 water, and water is expensive is many parts of the country. So 
sometimes it is worth spending a little more to get the quality needed 
in such a heavily used fixture.
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