
Water closet toilets are a staple in many residential homes, but have you ever stopped to think about how they work? A typical water closet toilet uses around 1.6 gallons of water per flush, which is a significant amount considering the average person flushes the toilet around 5-7 times a day.
The first flush valve is a key component of the toilet's flushing mechanism, and it's designed to minimize water usage. In fact, modern toilets often feature a dual-flush mechanism that allows users to choose between a full or partial flush, depending on the type of waste being disposed of.
The water closet toilet's bowl and tank are designed to work together in harmony, with the bowl being the container that holds the waste and the tank storing the water that's used for flushing. The bowl is typically made of ceramic or porcelain, and it's shaped in a way that allows for efficient waste disposal.
A well-maintained water closet toilet can last for many years, with some models lasting up to 20 years or more with proper care and maintenance. Regular cleaning and descaling can help prevent mineral buildup and keep the toilet functioning smoothly.
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Types of Water Closet Toilets
There are several types of water closet toilets, each with its own unique characteristics.
The most common type is the traditional toilet, which is a close-coupled toilet that consists of a toilet bowl and a separate cistern.
The wall-hung toilet is another popular option, which is mounted directly to the wall and has a hidden cistern.
The low-level toilet is designed to be more accessible, with a lower seat height that makes it easier to use for people with mobility issues.
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One-Piece
The one-piece water closet is a great option for those who value ease of cleaning and durability. Its seamless design leaves no room for germs and bacteria to grow.
One significant benefit of the one-piece water closet is that it's easy to clean. This is due to its moulded design, which prevents water leaks or cracks between joints.
The one-piece water closet is more durable than the two-piece water closet. This is because its moulded design eliminates the risk of water leaks or cracks between joints.
Its direct attachment of the toilet bowl and tank without any joints is a clear giveaway that it's a one-piece toilet.
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Floor Standing
Floor standing water closets are often used in commercial buildings because they allow for more room for storage underneath than wall-mounted units do.
They typically have larger tanks that don't need to be emptied or filled as frequently as smaller tanks.
This can be a big plus in high-traffic areas where maintenance is a concern.
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What's the Difference?
In the modern day, the term "water closet" has taken on a new definition, referring to a small, closed room containing a toilet that's situated within a larger bathroom.
These rooms may or may not also have a small sink for washing up.
The one-piece water closet is a popular option due to its easy-to-clean design, which leaves no room for germs and bacteria to grow.
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This seamless design also makes it more durable than the two-piece water closet, as it can prevent water leaks or cracks between joints.
A toilet is a plumbing fixture that straddles the drain pipe and sits on top of the ground or floor.
On the other hand, a water closet is a fixed personal hygiene station that includes not only a toilet but also an indoor basin with a water closet (sink) and one or more other items such as toilet paper, soap, towels, etc.
Water closets usually have rough floors made of ceramic tiles, which are easier to clean than the carpeting on most toilets in homes.
The water closet basin typically includes two faucet handles: hot and cold.
Different Types of
Floor standing water closets are often used in commercial buildings because they allow for more room for storage underneath than wall-mounted units do.
They have larger tanks that typically don't need to be emptied or filled quite so frequently, which can be a cost-effective option in the long run.
Floor standing fixtures tend to be more expensive than other types of water closets.
Choosing the ideal water closet for your comfort is crucial, and it's essential to consider your needs and budget when making a decision.
Selecting the right water closet will be easier with the information provided, and working with sales and technical specialists can also provide a personalized experience.
Design and Installation
Before installing a water closet, it's essential to determine if your bathroom has enough space to accommodate it. Consider the room's dimensions and how the water closet would fit into the current flow of the space.
You'll also need to check if your plumbing, ventilation, and electrical systems are suitable for a water closet. This includes ensuring you have windows and/or exhaust fans, as well as well-placed lighting.
Any major changes to your plumbing will need to meet building codes and regulations, so be sure to check with local authorities and home contracting experts in your area before starting the installation process.
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Close-Coupled
The close-coupled water closet is a popular choice for many homeowners due to its significantly lower price.
Both the tank and bowl can be replaced individually, making maintenance costs lower.
Cleaning can be challenging due to the distance between the tank and bowl, which is a potential breeding ground for bacteria and other contaminants.
The joint design of the close-coupled toilet makes it less durable, leading to leaks or cracks between the tank and bowl over time.
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Wall Hung
Wall-hung toilets offer a sleek and minimalist design that's perfect for small bathrooms. They're typically more contemporary and aesthetically pleasing than floor-mounted toilets.
Placing the water tank inside the wall takes up less space, freeing up an additional 12 inches of area in the bathroom. This can be a game-changer for small bathrooms that need all the extra space they can get.
A wall-hung toilet is situated at least 15 inches above the floor, making it much simpler to clean the surrounding area and floor than a standard floor-mounted water closet.
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Pedestal
The pedestal water closet design offers a unique advantage when it comes to space and cleaning. Its tank is mounted on top of an elevated support base, providing more space underneath the bowl.
This design allows for easier cleaning than other types of toilets. Some pedestal-type water closet models have a small wall between the seat and the tank to help contain any splashback.
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Extended Wall Mounted
The Extended Wall Mounted Water Closet is a game-changer for bathroom design.
This type of toilet is mounted on the wall, freeing up valuable floor space. It's perfect for small bathrooms or commercial buildings where floor space is limited.
Wall-mount units have smaller tanks that may require more frequent emptying than other types of toilets. You'll need to empty the bowl more often, but it's a small trade-off for the added style and functionality.
Placing the tank inside the wall also takes up less space, giving you an extra 12 inches of area for other items in the bathroom. This is a great benefit for those who want to create a more minimalist design.
The Extended Wall Mounted Water Closet has an extra large capacity that will allow for up to 12 flushes before needing to be emptied. This means you can go longer between cleanings, which is a big plus for busy households.
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Design and Installation Requirements

Before you start designing and installing a water closet, it's essential to determine if your bathroom has enough space to accommodate it. Consider the room's dimensions and how it would fit into the current flow of the space.
The plumbing system is a critical aspect of a water closet's functionality. You'll need to ensure that it's properly connected to the existing plumbing.
Ventilation and electrical systems are also crucial for a water closet. Windows and/or exhaust fans are a must to maintain good air quality.
Well-placed lighting can make a significant difference in the overall ambiance of the space. Modern luxury can be achieved with the right lighting.
Any major changes to your plumbing will need to meet building codes and regulations. Check with local authorities and home contracting experts in your area before proceeding.
How to Install?
The fitting process for a water closet is similar to that of the toilet, with one notable exception: the trapway. The trapway consists of two pieces and connects at a pivot point in an L-shape.
The wye and spigot are the two pieces of the trapway, and they need to be assembled before being lowered into place on top of the floor drain opening in the concrete slab. They can then be connected together by joining them at their pivot point with an elbow connector or using bolts if the spigot is too high to reach.
The height of the wye and the distance from your floor drain opening to your sewer connection will determine how long you need for a water closet fitting process. This is important to consider before starting the installation.
All of our water closets are easy to install with either bolts or screws.
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Hygiene
In terms of hygiene, separating a water closet from other bathroom fixtures is a game-changer. This simple design choice keeps odors and germs isolated to one area.
Tubs, showers, and sinks remain clean for use because of this separation.
Multiuse Function

In a bathroom suite, a water closet is ideal for its multiuse function, allowing multiple people to use the bathroom at the same time.
This means someone can use the toilet while someone else dries their hair, showers, or brushes their teeth, making it a convenient option for households with multiple occupants.
By having a water closet in a primary bathroom, you can ensure that everyone can use the bathroom without having to wait for each other to finish.
Residential Dwelling Units
In residential dwelling units, there are specific requirements for water closets. At least one bathroom must comply with accessibility standards in units required to be mobility accessible.
A water closet in a residential dwelling unit must meet certain criteria, including a minimum space of 30 by 60 inches, though 36 by 66 inches is recommended for a more comfortable user experience.
In residential dwelling units, water closets can overlap with lavatories if additional clearance depth is provided. This is allowed under certain conditions, such as if grab bars and knee and toe space are provided after construction.
In residential dwelling units, water closets are permitted to have exceptions that allow features like grab bars and knee and toe space to be provided after construction as needed. This is subject to certain conditions being met.
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Multi-User Rooms

Multi-User Rooms are designed to accommodate multiple people at the same time, making them ideal for bathroom suites in residential homes. This allows someone to use the toilet while someone else dries their hair, showers, or brushes their teeth.
In multi-story facilities, toilet rooms must be provided on a story that is connected to an accessible entrance by an accessible route. This ensures that people with mobility impairments have equal access to the facilities.
The Standards specify two instances for toilet room location: when facilities are exempt from vertical access requirements and when alterations are made to existing toilet rooms.
Here are the two instances:
- Where toilet rooms are provided in multi-story facilities that are exempt from the requirement for vertical access between stories, a toilet room must be provided on a story that is connected to an accessible entrance by an accessible route.
- In alterations where it is technically infeasible to make men’s and women’s rooms comply, an accessible unisex toilet room is permitted as an alternative if it is located in the same area and on the same floor as the existing toilet rooms.
The Standards address toilet compartments and urinals, which apply in addition to criteria for toilets, lavatories, mirrors, dispensers, shelves, and other elements provided. This ensures that all aspects of the bathroom are designed with accessibility and functionality in mind.
Children's Compartments
Children's compartments should be designed with the user in mind, taking into account their size, stature, and reach ranges. The Standards provide non-mandatory guidance on specifications based on the age group served, which can be a useful resource.

Toilet compartments designed for children 12 and younger must be slightly larger, measuring 59″ wide for wall- or floor-mounted water closets. This is because children's maneuvering skills are generally less refined.
The toe clearance in children's compartments must be at least 12″ high to accommodate footrests that are higher above the floor. Additional space is required if toe clearance is not available below partitions.
If a toilet room or compartment is designed for children, all pertinent alternate specifications for toilets, compartments, grab bars, and dispensers must be applied. This ensures that the space is safe and accessible for its young users.
The decision to design a toilet room for children is left to other building requirements or regulations, good practice, client preference, or other factors. However, if a toilet room is designed for children, it's essential to select specifications that align with the primary user group and be consistent within an age bracket.
Dwelling Unit & Lavatory
In a dwelling unit, a water closet is ideal for bathroom suites, allowing multiple people to use the bathroom at the same time. This setup means someone can use the toilet while someone else dries their hair, showers, or brushes their teeth.
The requirements for children's water closets and toilet compartments are consistent with those based on adult dimensions.
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History and Evolution
The history of water closets is a fascinating one. Water closets date back to the 1500s, when indoor toilets and plumbing were being invented for the royals.
In the United States, outhouses were common well into the 1950s, and many Americans still rely on them today. Many upscale hotels and residences incorporated the European water closet model in the early 1900s.
Before the 19th century in America, only the wealthy had toilets inside their homes. By 1890, it became more common to have toilets inside the home, in rooms known as water closets.
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History and Evolution

Water closets have a rich history that spans over 400 years. They originated in the 1500s as indoor toilets and plumbing for the royals.
The concept of a water closet, an indoor space housing a flush toilet, became popular with the elite. Outhouses, pots, and communal privies were the norm before the connection between sanitation and public health was better understood.
In the United States, outhouses were common well into the 1950s, and many Americans still rely on them. However, many upscale hotels and residences incorporated the European water closet model in the early 1900s when indoor plumbing became more popular and accessible in American cities.
Water closets date back to the 1800s, with toilets becoming more common inside homes by 1890. These rooms were known as water closets, and it wasn't until the 20th century that bathrooms and water closets were merged into the same space.
Many homes now boast a modern spin on the W.C., with a “half-bath” concept that combines a toilet and sink. These guest baths or powder rooms are useful for ground-floor visitors.
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What Is a Closet in Modern Times?
In modern times, a closet can refer to a small, enclosed space for a specific purpose, like a water closet.
A water closet, specifically, is a small, closed room containing a toilet, often situated within a larger bathroom.
These rooms usually have sliding pocket doors as a space-saving mechanism.
In some cases, a water closet may also have a small sink for washing up, but this is not always the case.
The concept of separating the toilet from the rest of the bathroom has led to the modern definition of a water closet.
Benefits and Advantages
A water closet toilet is a great choice for anyone looking to upgrade their bathroom experience.
They're designed to be more comfortable and easier on your body than a standard toilet.
One of the most significant advantages of water closets is that they don't produce any odors, since they don't use water or electricity for flushing.
The installation process is also much easier than a standard toilet, which can be a huge relief for DIY enthusiasts.
And if you do need to replace any parts, the cost is significantly lower than what you'd pay for a standard toilet.
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Disadvantages and Considerations
Water closet toilets may not be the best fit for every home, especially those with limited space. Installing a water closet can be tricky due to its size and design.
One major issue is the height requirement. Water closets need to be installed at specific heights, making it harder for people with varying heights to adjust the toilet to their liking. This can be a challenge, especially for those who are taller or shorter than average.
A larger space is often needed to accommodate the size of the water closet bowl and trap. This can be a problem for people living in small homes or apartments, where space is already limited.
The design of standard bathrooms can also make it difficult to install a water closet comfortably. This is because traditional toilets have been designed for centuries, while water closets are still a relatively new concept on the market.
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Accessibility and Features
To ensure that water closet toilets are accessible to everyone, it's essential to consider the layout and features of the toilet compartments.
At least one toilet compartment must be wheelchair accessible, with the door offset from the water closet to allow for easy entry.
This means that compartment doors can be hinged on either the left or right side of the opening, providing flexibility in design.
Providing an accessible unisex toilet room in addition to multi-user toilet rooms is helpful for those who use personal care assistants of the opposite sex.
Unisex Rooms
Accessible unisex toilet rooms are a must-have in many buildings, especially in assembly and mercantile occupancies with six or more toilet fixtures. The International Building Code requires them.
Providing an accessible unisex toilet room is helpful for those who use personal care assistants of the opposite sex. It's a thoughtful touch that makes a big difference.
Unisex toilet rooms must comply with specific requirements, including having privacy latches and containing at most one lavatory, one water closet, and one urinal (or a second water closet). This ensures a safe and private space for everyone.
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In some cases, an accessible unisex toilet room can be used as an alternative to multi-user rooms, especially in alterations where making multi-user rooms comply is not technically feasible. This is a great option when flexibility is needed.
Here are some key requirements for unisex toilet rooms:
- Must have privacy latches
- Can contain at most one lavatory, one water closet, and one urinal (or a second water closet)
Wheelchair Accessible Compartments
Wheelchair Accessible Compartments are a must-have in any building. At least one toilet compartment must be wheelchair accessible where toilet compartments are provided.
To ensure accessibility, compartment doors must be offset from the water closet in either the front or the side partition so that there is space to enter the compartment. Doors can be hinged on the left or right side of the opening.
The design of wheelchair accessible compartments can vary, but they must meet specific requirements. Providing additional space in toilet rooms will enhance usability.
These requirements are in place to ensure that people with mobility impairments can use the facilities safely and easily.
For Children 12 and Under

For children 12 and under, designing a toilet room with their needs in mind is a thoughtful touch. The Standards provide optional specifications based on children's dimensions, allowing for a more accessible and comfortable experience.
The decision to design a toilet room for children is left to other building requirements or regulations, good practice, client preference, or other factors. This means that you have the flexibility to choose the specifications that best suit your needs.
If you decide to design a toilet room for children, all pertinent alternate specifications for toilets, compartments, grab bars, and dispensers must be applied. This includes the specifications for water closets and toilet compartments.
Here are some key specifications to consider for children 12 and under:
These specifications reflect the differences in size, stature, and reach ranges of children ages 3 through 12. By choosing the right specifications, you can create a more inclusive and comfortable space for children to use the bathroom.
Installation and Placement
Before you start installing your water closet, make sure to determine if your bathroom has enough space to accommodate it. Consider the room's dimensions and how it would fit into the current flow of the space.
You'll also need to think about the plumbing, ventilation, and electrical systems that will make your water closet functional. This includes installing windows and/or exhaust fans to ensure good airflow.
Well-placed lighting can add a touch of modern luxury to your bathroom, and don't forget to budget for details like wall coverings, finishes, and water-efficient toilets.
Single User Room
The single user toilet room is a crucial aspect of any building's design.
The ADA Standards don't directly specify the size of toilet rooms, which can be determined by various factors such as the layout and number of fixtures.
Providing additional space in toilet rooms will enhance usability.
The layout of a single user toilet room can be configured in many different ways, and the Standards allow for this flexibility.
The minimum dimensions specified in the Standards can be used as a guide for designing compliant toilet rooms.
These designs are just examples, and you can always add more space to make the room more user-friendly.
Example: Lavatory Opposite

In a toilet room, the lavatory can be placed opposite the water closet, which can help save space by eliminating the need for wheelchair space beyond the arc of the door swing.
This configuration is allowed as long as the door swing is located outside fixture clearances, ensuring there is enough space for a wheelchair to maneuver.
To ensure the turning space is free of any overlapping elements, fixtures and other elements can overlap the turning space, but not the door maneuvering clearance.
Comfort and Convenience
Choosing the right water closet is crucial for your comfort and convenience. It's essential to pick a water closet that suits your needs, and a good starting point is to list your requirements.
Selecting a water closet that fits your budget is also important, as it can make a big difference in your overall experience.
What is a Water Closet Toilet?
A water closet toilet is a small, closed room containing a toilet, often situated within a larger bathroom. It's a space-saving design feature.
These rooms typically have sliding pocket doors, which help to maximize space in smaller bathrooms. Some may also include a small sink for washing up.
In modern real estate, the term "water closet" has taken on this new meaning, emphasizing the separation of the toilet from the rest of the bathroom.
Why is it Called?
The term water closet has a rich history, and its name is derived from the English translation of a French phrase, "lavabo et pot de chambre", which means wash basin with chamber pot. This phrase is a direct reference to the original design of the first flushing toilets used at home.
The original design required two basins and plumbing connections for washing liquid waste into a storage container below ground level. This early design laid the foundation for the modern water closet toilet.
The term water closet is now used to describe a toilet room, often with two doors, one leading into the bedroom or dressing room for privacy and the other opening onto a hallway with no windows. This layout is designed to maintain a sense of seclusion and modesty.
The term has also come to replace other terms like privy, lavatory, powder room, and bathroom due to its more private connotation. Water closets are also commonly referred to as toilet rooms or WCs.
What is a Closet?
A closet is a small room or enclosure, but it's not necessarily related to clothing storage.
In the context of a water closet, a closet is a small room or enclosure with a toilet.
Sometimes, closets can be completely separated from other facilities, like a sink or bathtub.
Historic homes often have separate water closets or closets with a toilet, which can be a unique feature.
Modern closets, like water closets, may have a sliding door entrance or a half-wall to save space.
Frequently Asked Questions
Do water saving toilets work?
Yes, water-saving toilets are effective in reducing water consumption and saving homeowners money on their water bills. By switching to a low-flow toilet, you can save up to $110 per year and recoup your initial investment over time.
What's the difference between WC and toilet?
A WC is a room with a toilet but no bath, whereas a toilet is a fixture for personal hygiene, often found in a bathroom. The terms are often used interchangeably, but WC specifically refers to a room without a bath.
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