Bidets are an increasingly common feature of modern bathrooms. In this video and guide, This Old House plumbing and heating expert Richard Trethewey explains various bidet options with host Kevin O’Connor, demonstrating their features and how they’re installed.
Why Install a Bidet?
Many homeowners consider bidets for the enhanced hygiene and environmental benefits they provide. Bidets are designed to cleanse with water, which is often considered more effective and gentle than using toilet paper alone. This can be especially beneficial for people with sensitive skin, certain medical conditions, or mobility issues.
In addition to better hygiene, bidets reduce the need for toilet paper, helping to lower your household’s environmental impact and potentially saving money over time. If you’re interested in a more eco-friendly bathroom experience, installing a bidet can be a worthwhile investment.
Types of Bidets
Bidets have a rich history dating back to 17th-century France. Initially separate fixtures, they’ve evolved to become integrated with modern toilets. Modern bidet costs can range in the thousands for an all-in-one bidet toilet to around $60 for a bidet attachment that can be installed under any toilet seat.
Standalone Bidets
Cost: $300–$600
Requirements: Separate plumbing line, space for separate fixture, professional installation
Traditional standalone bidets are separate fixtures installed next to the toilet. They require additional plumbing and space, making them less common in modern bathrooms.
To install a separate bidet in your bathroom, you would need:
- Two 3/8″ shutoff valves (hot and cold)
- 1-1/4″ drain stub-out (in the wall or floor)
- 1-1/4″ P-Trap
- Backflow preventer (air gap or vacuum breaker)
Standalone bidets can deliver heated water without the need for an electric connection and they are easy to clean. Though the bidet itself can be purchased for as low as $300, installing the plumbing necessary can make this option prohibitively expensive.
All-in-One Bidet Toilets
Cost: $500–$5,000
Requirements: Electric outlet (usually), professional installation
All-in-one bidet toilets combine a toilet and bidet into a single fixture. While expensive, they offer the most comprehensive features and seamless integration. Costs can vary depending on design and features, but most options are between $1,000–$2,000.
Common bidet features include:
- Air dryer
- Adjustable water pressure and temperature
- Deodorizer
- Heated seat
- Night light
- Remote control operation
- Warm water cleaning
The bidet can draw water from the same line used for your toilet. Many advanced bidet seats–including all-in-one bidet toilets–require electricity. You’ll need a GFCI (ground-fault circuit interrupter) outlet near the toilet. If there isn’t one already in your bathroom, adding one may require professional assistance.
Bidet Toilet Seats
Cost: $100–$1,000
Requirements: Electric outlet (usually)
Bidet toilet seats replace your existing toilet seat and can include the same features as all-in-one bidet toilets (listed above). These are less expensive and do not require professional installation.
There are electric and non-electric bidet toilet seat options. Non-electric options have no features other than adjustable water pressure. The water temperature will always be cold, but there is no need for an electric outlet. This variety is also less expensive, typically under $100.
Underseat Bidet Attachments
Cost: $50–$100
Requirements: None
These simple devices attach underneath the toilet seat and connect to the water supply. They’re affordable and easy to install but can only deliver cold water. The direction and pressure can be adjusted, but that is all.
Portable Bidets
Cost: $20–$50
Requirements: None
Compact and travel-friendly, these provide the benefits of a bidet on the go. These handheld devices are easy to use and don’t require any installation. Less expensive options are squeeze bottles that offer little water pressure. Battery-powered models offer greater pressure though are more expensive.
How to Choose a Bidet
Before purchasing a bidet, check that it is practical for your bathroom and budget. You’ll want to consider what plumbing and electrical connections you have available and the type of toilet you have.
Plumbing Requirements
Standalone bidets require separate plumbing connections, including:
- Drain connection
- Hot and cold water supply lines
- P-trap installation
All-in-one bidet toilets replace your existing toilet and typically requires professional installation. Toilet seat and underseat bidets can be installed by anyone using just the existing toilet water line.
Electrical Needs
Many advanced bidet seats and all-in-one units require electricity. If your bathroom has no electrical outlet, you must have one professionally installed. Otherwise, look for bidets that do not require electricity.
Toilet Compatibility
Ensure your chosen bidet seat or attachment is compatible with your toilet’s shape and size. Most bidet seats fit elongated toilets, but options for round bowls may be limited.
Maintenance and Care for Your Bidet
Bidets generally require minimal maintenance, but it’s essential to care for them properly to ensure their longevity and functionality. For all bidet types, regular cleaning of the nozzles and surrounding areas is necessary to prevent the buildup of bacteria or debris. Most modern bidets come with a self-cleaning function, but manual cleaning is still recommended. Use mild cleaners and avoid harsh chemicals that could damage the nozzles or finishes. In addition, periodically check the connections and hoses for leaks or wear, especially in high-use areas. Proper care will keep your bidet functioning smoothly for years to come.
Common Bidet Questions
Many first-time bidet users have questions about their use and hygiene:
Do You Wipe Before Using a Bidet?
It’s not necessary to wipe before using a bidet. The water stream is designed to clean thoroughly.
Are You Wet After Using a Bidet?
Most modern bidets include a drying feature. For those without, a small amount of toilet paper or a hand towel can be used for drying.
How Do You Sit on a Bidet?
For standalone bidets, you typically face the fixtures. For bidet seats and attachments, you sit as you normally would on a toilet.
