Can You Put A One Hole Faucet In A 3 Hole Sink?

So your current faucet is starting to look a little outdated for your taste. Your guests are too polite to say anything when they’re over, but your family and friends mock you relentlessly every time they see it.

After much friendly abuse, you decide that today is the day you buy a new faucet. You go out shopping with your significant other for what seems like hours until you finally come across the one.

Everything about it is awesome, from the material to it’s functionality and how well it would fit with the sink. Only one problem, it’s a single hole faucet, and you just removed your faucet that had 3 holes.

So, can you put a one hole faucet in a three hole sink? Yes, most faucets now of days come with a deck plate that allows you to cover up the remaining holes of the sink, providing you with a more aesthetic look.

The process of buying a new faucet can be quite a fun activity, and it’s ability to spruce up a bathroom of kitchen is definitely an added bonus. \

The post will hopefully cover all of your answers regarding faucets, sinks, holes in the sink and much more. There will be lots of great information to read, continue doing so to learn more!

How Can A One Hole Faucet Work With A Three Hole Sink?

Faucets have been manufactured for quite a long time and have gone through many different changes to style, functionality as well as sizes.

So it’s no surprise that over time, many issues have come up surrounding faucets and their placement in sinks.

It’s inevitable that faucets and sinks over time will need to be replaced, repaired and updated. Something that had to be addressed really quickly was how can faucets work with many other sinks?

The answer is standardized measurements. Now of days, most faucets and sinks come within a standardized measurement range that allow them to universally work almost anywhere.

The Deck Plate

One of the inventions that had to have been made along with standard sized holes, spacing and measurements was an aesthetic piece of material that would work with the faucet to cover up any additional holes the one hole faucet couldn’t fill.

The deck plate can be made of different materials like most commonly plastic or stainless steel, but can usually be found in colors and materials of specific faucets.

Most of the time you will actually get one of these deck plates pre-packaged with your faucet, but if not, a quick call to the manufacturer of the faucet and you should be able to find one that matches.

Typically though, deck plates don’t come for the larger ‘wide spread’ style of faucet, but rather mini spread and center set.

What Is Meant By One Hole Faucet?

Faucets come in a few different variations, such as “one hole” which means there is one point to where all the water supply lines and threaded attachments are located on the faucet. This style of faucet utilizes one hole in a sink.

Some other variations of faucets are three hole faucets, where the faucet may require a three hole sink. An example would be the left and right holes are used as the place where you tighten faucet to sink, and the middle hole is where the water supply runs through.

Some faucets come with spout and handles all separated from each other and would require individual installation. Others come as one solid unit.

Are Faucet Holes The Same Size?

The worldwide standard for a faucet hole according to multiple sources (links below) is 1 3/8″ diameter.

However, upon further research into many different faucet manufacturers, and many different faucets I have found that often times they come with an 1 1/2″ diameter hole spacing.

It is possible to drill out the hole larger to accommodate the size difference. If you have marble, you will need to call a professional to come in and cut it for you.

Sink Hole Spacing Measurements

Aside from the diameter of the hole, there is another important measurement to be aware of and that is the spacing of the sinks holes.

Faucets can come as either center set, mini spread, wide spread or single hole.

Traditionally with mini spread and center set faucets you are looking at 4″ from center of the furthest left hole to center of the furthest right hole.

Widespread faucet has a greater distance and can handle larger faucets ranging from the 8-16″ range.

A single hole faucet will normally be the one that comes with the deck plate as it usually will only take up one hole.

I have another post going more into detail about the differences in faucets, if you would like to check out you can do so by clicking here. I recommend it, as I feel like it pairs nicely with this post.

Depth Of The Counter Top

Another important factor to consider when buying a new faucet is the depth of your counter top.

It is important to get this measurement as if it’s too thick, your faucet will either have nothing to fasten onto or the connection won’t be that tight.

A typical depth you’ll find in a laminate based counter top is 1 1/2″, although depending on the material it may be more or less.

With granite, having too thin of a top could result in a fragile surface, therefore they are typically in the 3/4″ – 1 1/4″ range.

Again, browsing through many different faucet specification sheets set out by the manufacturer, I have noticed threaded lengths (part that fastens faucet to sink) at anywhere from 1 3/8″ to 1 1/2″, 2″ and even longer.

Keep in mind though, many deck plates will actually sit the faucet up slightly higher than normal. It may not be enough to affect anything, but something to think about.

With faucets, it is one of those things that won’t be too hard to find the right one for your sink, but may still be worth checking if you have an unusually thick counter top.

What Can I Do With An Extra Hole In My Sink?

Sometimes, you just can’t fill all of the holes of your sink and are left with one outlier off to the side.

This gaping black hole can really suck everyone in the room’s attention towards it. It’s not the best thing to look at, and most want it to be covered up.

Thankfully there are some options available to you to make the space useful.

Sink Hole Cover

Plain and simple, this option allows you to add a cover to the hole. The diameter of this is usually made a little bit larger than the 1 3/8″ diameter of the hole, and so this is so that the cover can sit on top without falling through.

There is a threaded piece that extends below, where a nut can be screwed on to snug it in place. You can find one by clicking on my link to Amazon here and it comes in a few different color choices to match different sinks.

Soap Dispenser

I almost don’t feel like mentioning this one, as every Google search result will lead you to this option, but while you’re reading this article anyways let’s have at ‘er.

A soap dispenser can be a great add-on to a sink and along with the sink hole cover is a very user friendly, easy to install option.

Much like the cover also, there is a top portion big enough to sink on the sink, and a bottom threaded portion that allows you to snug it up to the sink.

The soap bottle is removable, and you don’t have to uninstall the hole dispenser every time you want to add more soap as the bottle has threads itself.

Here is a link to Amazon where you can find a soap dispenser with a clean look to it.

Reverse Osmosis System

If you’ve ever been thinking of buying an R.O system, now is the time. Reverse osmosis systems usually come with it’s own faucet and therefore need a separate hole for installation.

If you would like to learn more about reverse osmosis, you can check out my other post by clicking here.

If you’re unsure what this system even is, the post goes into a little bit of what the R.O system does as well as gives you a better perspective on the unit and how it works.

Here (link to Amazon) you’ll find my highly recommended unit made by Whirlpool.


Tyler Takacs

My name is Tyler, I live in Ontario Canada and enjoy learning about common plumbing issues in the household. I have spent just over three years in the trades as a plumbers apprentice, but am now onto a less physical job. I still enjoy studying and learning about my own house's plumbing as well as finding ways to help others with their issues.

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