If you’re deciding between the Brondell Swash CL99 and the Brondell Swash S101, you’re looking at two of the most popular non-electric bidet seats on the market.
Both are part of Brondell’s trusted Swash Ecoseat lineup — but subtle differences between them could make one a better fit for your bathroom than the other.
| Feature | Brondell Swash CL99 | Brondell Swash S101 |
|---|---|---|
| Image |  |
 |
| Dimensions (L x W x H) | 20.03″ x 14.39″ x 2.55″ (elongated) | 20.03″ x 14.39″ x 2.55″ (elongated) |
| Type | Non-Electric Bidet Seat | Non-Electric Bidet Seat |
| Water Temperature | Ambient (cold) | Ambient (cold) |
| Nozzles | Dual (rear + front) | Dual (rear + front) |
| Nozzle Self-Cleaning | Yes | Yes |
| Slow-Close Lid | Yes | Yes |
| Design Generation | Newer (updated model) | Original (classic model) |
| Buy Now |  |
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1. Brondell Swash CL99 Non-Electric Bidet Seat
The Brondell Swash CL99 is the newer iteration of Brondell’s entry-level Ecoseat lineup, and it shows in the details.
It keeps everything that made the original great while refining the design and improving the hardware polish — making it the go-to option if you’re buying fresh and want the most current version from Brondell.
Features
- Dual retractable nozzles for rear and front (feminine) wash
- Adjustable water pressure via side-mounted knob
- Self-cleaning nozzle function built into the wash knob
- Slow-close seat and lid to prevent slamming
- Ambient (cold) water — no electricity or batteries required
- Quick-release seat mechanism for easy cleaning
- Compatible with elongated and round toilet bowls (separate SKUs)
Pros
- Updated design with a more refined finish and chrome accent dial
- Tool-free installation in minutes — no plumber needed
- Fits most standard North American toilets
- Reduces toilet paper use significantly, saving money over time
- Very low seat profile keeps the look sleek and modern
Cons
- No warm water — ambient only (cold supply line temperature)
- No heated seat, dryer, or any electric features
- Water pressure is dependent on your home’s supply pressure
The CL99 is the right pick if you’re buying a non-electric bidet seat today and want the most polished, current version Brondell offers at this price point.
It’s a particularly smart choice if you’re moving from toilet paper for the first time and want a reliable, zero-electricity option — you can learn more about how these types of seats compare in our bidet toilet vs bidet seat breakdown.
Check its current price on Amazon
2. Brondell Swash S101 (EcoSeat 101) Non-Electric Bidet Seat
The Brondell Swash S101 — also known as the EcoSeat 101 — is the original model in Brondell’s non-electric seat lineup and one of the most reviewed entry-level bidet seats available today.
It established the Ecoseat formula: dual nozzles, adjustable pressure, slow-close lid, and zero electricity required — and it continues to be a strong performer at an accessible price.
Features
- Dual nozzle system for rear and front (feminine) wash
- Adjustable water pressure with side-mounted control knob
- Nozzle self-cleaning via the same knob (pre-wash rinse)
- Slow-closing seat and sturdy sittable lid
- Ambient cold water — powered entirely by your water supply
- Quick-release button for easy removal and cleaning underneath
- Textured chrome dial accent for a premium look
Pros
- One of the most affordable bidet seats from a top-tier brand
- Huge review base — thousands of verified buyers with consistently strong ratings
- No electricity or batteries needed — ideal for any bathroom
- Installs in minutes with no tools or plumber required
- Widely available in both elongated and round toilet versions
Cons
- Older design generation compared to the CL99
- No warm water, heated seat, or air dryer
- Spray pressure varies based on your home’s water pressure
The S101 is a proven, battle-tested option that’s been cleaning up its reputation year after year.
If you’re comparing it against other non-electric seats in a similar price range — or deciding whether to go non-electric vs electric — our bidet toilet seat comparison chart is a great resource to bookmark alongside this article.
Check its current price on Amazon
Design and Build Quality
Both the CL99 and S101 share the same slim, low-profile form factor and are built from germ-resistant ABS plastic.
The CL99 represents a newer generation of the same design language, featuring an updated chrome dial accent and tighter tolerances in the finish.
The S101, while slightly older in its design, still looks clean and modern on any toilet.
If visual polish and having the most current hardware matters to you, the CL99 has a slight edge.
For day-to-day functional durability, both seats perform equally well — Brondell builds these to last, and both come backed by the brand’s quality reputation.
Winner: Brondell Swash CL99 — newer generation design with updated finish details.
Wash Performance
This is where both seats are essentially identical.
Both use dual retractable nozzles — one for posterior wash, one for feminine wash — and both activate via the same side-mounted knob.
Water pressure on both models is adjustable and fed directly from your cold water supply line, which means the spray strength you get depends on your home’s water pressure.
The self-cleaning function works the same way on both: a slight turn of the knob before the wash zone activates a pre-rinse of the nozzle, keeping it sanitary.
If you’re used to electric bidets with warm water and strong jets, both of these will feel like a step down — but within the non-electric category, both deliver solid, reliable cleaning.
For a broader look at how non-electric seats stack up, check out our best bidets for existing toilets guide.
Winner: Tie — identical wash system, identical performance.
Installation
Both the CL99 and S101 install the same way: remove your existing toilet seat, slide the mounting plate in place, connect the T-valve to your cold water supply, and attach the bidet hose.
Neither requires electricity, an outlet, or a plumber.
Most buyers complete the installation in under 15 minutes, making both of these among the easiest bidet seats to set up.
The CL99 ships with a 29-inch braided metal hose and a metal T-valve, while the S101 ships with a similar setup using a 27.5-inch braided hose.
Both fit standard North American toilet rough-ins without any modifications.
If you’re undecided about whether a bidet seat is the right format for you at all, it’s worth reading our handheld bidet vs bidet seat comparison first.
Winner: Tie — both install equally fast with no tools required.
Comfort and Usability
Day-to-day comfort is nearly identical between the two models.
Both have a slow-close seat and lid that prevents the jarring slam you get with cheaper toilet seats.
Neither offers a heated seat, warm water, or an air dryer — so if those features are important to you, you’ll want to look at Brondell’s electric lineup like the top-rated bidets with dryers.
The quick-release button on both models makes it easy to pop the seat off for thorough cleaning underneath.
The CL99’s updated seat profile may feel slightly more refined underside, but both seats are ergonomically similar and comfortable for extended use.
Winner: Tie — both deliver the same comfort features; neither offers electric amenities.
Value for Money
Both the CL99 and S101 are genuinely affordable bidet seats that deliver far more than their price suggests.
The CL99 is typically priced slightly higher than the S101 due to it being the newer model — but the difference is modest.
If you can find the S101 at a significant discount, it represents exceptional value given its track record and review volume.
If pricing is close between the two, the CL99 is the better buy — you get the updated design and the current-generation hardware for a small premium.
Both are highlighted in our guide to the best bidets under $200, which is a good reference point for where these sit in the broader market.
Winner: Brondell Swash CL99 — marginally better value at similar price points due to updated components.
Verdict — Which One Should You Buy?
Both the Brondell Swash CL99 and S101 are excellent non-electric bidet seats that share the same core design and wash system.
The real question isn’t which one is “better” — it’s which one is right for where you are right now.
Buy the Brondell Swash CL99 if… you’re buying new and want the most current version of Brondell’s Ecoseat design, you appreciate the updated chrome hardware finish, or you simply want the newest generation without any concern about legacy components.
Buy the Brondell Swash S101 if… you find it at a notably lower price than the CL99, you’ve seen it recommended or reviewed extensively and trust its track record, or you’re replacing an existing S101 and want an identical fit and feel.
Either way, you’re getting one of the most reliable non-electric bidet seats from one of the most respected names in the category — the kind of upgrade you can find covered in depth at our best bidet brands guide.
FAQ
Is the Brondell Swash CL99 a replacement for the S101?
Yes — the CL99 is widely considered the updated successor to the S101 Ecoseat design.
Both use the same core mechanism, but the CL99 features a newer generation finish and updated hardware components.
Do either of these seats offer warm water?
No — both the CL99 and S101 are ambient-temperature seats that use cold water from your supply line only.
If you want warm water without electricity, you’d need the dual-temperature S102 or CL129 models, which connect to both your hot and cold supply lines.
Are these seats compatible with round toilets?
Yes — both the CL99 and S101 are available in elongated and round versions.
Make sure you select the correct shape (EW for elongated, RW for round) when purchasing, as the fits are not interchangeable.
Our guide to the best bidets for round toilets has more helpful context on sizing.
Can seniors use these seats comfortably?
Absolutely — the simple knob-based controls on both seats make them easy to use for anyone, including seniors and those with limited mobility.
However, if you need a heated seat or additional comfort features for an elderly user, our best bidets for seniors guide covers options specifically suited to that need.
Conclusion
The Brondell Swash CL99 vs S101 comparison ultimately comes down to one thing: generation.
The CL99 is the updated model with a refined design; the S101 is the original with a massive review base and proven track record.
Both clean equally well, install in minutes, and require zero electricity — making them ideal for anyone who wants a better bathroom experience without a complicated setup.
If you’re buying today, go with the CL99.
If you find the S101 at a great price, it’s still a buy you won’t regret.
Either way, you’re joining the growing number of households making the switch — and once you try a bidet seat, you’ll wonder how you ever lived without one.
Still exploring your options? Check out our full best bidets for home use guide or browse the best self-cleaning bidets for a wider look at what’s available today.
