If you’re looking for a non-electric bidet seat that skips the cords without skipping on cleanliness, the Brondell EcoSeat S101 and Swash CL99 are two of the most popular picks you’ll find.
Both run entirely on water pressure, both are budget-friendly, and both come from one of the most trusted names in the bidet industry — so which one should you choose?
| Feature | Brondell EcoSeat S101 | Brondell Swash CL99 |
|---|---|---|
| Image | [Image loads via plugin] | [Image loads via plugin] |
| Dimensions (L x W x H) | 20.03″ x 14.39″ x 2.55″ (Elongated) | 20.03″ x 14.39″ x 2.55″ (Elongated) |
| Water Temperature | Ambient (cold water only) | Ambient (cold water only) |
| Nozzles | Dual retractable (rear + front) | Dual retractable (rear + front) |
| Nozzle Self-Cleaning | Yes — before & after each use | Yes — before & after each use |
| Water Pressure | Adjustable (20–87 psi) | Adjustable (20–87 psi) |
| Slow-Close Lid | Yes | Yes |
| Bidet Hose Length | 27.5″ braided metal | 29″ braided metal |
| Bowl Compatibility | Elongated & Round | Elongated & Round |
| Buy Now |  |
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1. Brondell Swash EcoSeat S101
The Brondell Swash EcoSeat S101 is the brand’s flagship non-electric bidet seat, and it has built a loyal following for good reason.
It runs entirely on your home’s water pressure, requires no outlet, and installs in under 20 minutes — making it one of the easiest upgrades for any existing toilet.
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Features
- Dual retractable nozzles for rear and front wash
- Self-cleaning nozzles that rinse before and after each use
- Adjustable water pressure via intuitive side-mounted dial
- Ambient (cold) water temperature — no hot water connection needed
- Slow-close ergonomic lid and seat
- Sittable lid rated up to 330 lbs
- Fits elongated and round toilets
- 27.5″ braided metal cold water hose included
- DIY installation — no plumber or tools needed
Pros
- Extremely simple controls — one dial does everything
- Trusted brand with long track record in North America
- Ultra-slim profile blends with any bathroom
- No electricity means zero energy costs and no outlet required
- Self-cleaning nozzle keeps hygiene worry-free
Cons
- Cold water only — no warm water option without upgrading to the S102
- No heated seat or air dryer
- Slightly shorter included hose compared to the CL99
Check its current price on Amazon
2. Brondell Swash CL99
The Brondell Swash CL99 is marketed as the “Essential” non-electric bidet seat, and it delivers a near-identical experience to the S101 at a comparably budget-friendly price point.
Like the S101, it’s fully powered by water pressure alone — zero electricity, zero batteries — making it one of the most eco-friendly choices in the affordable bidet category.
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Features
- Dual retractable wash wands for posterior and feminine cleansing
- Hygienic self-cleaning wands — rinse before and after use
- Adjustable water pressure via right-side jog dial control
- Ambient temperature wash — cold water line only
- Slow-close ergonomic lid and seat
- Sittable lid rated up to 330 lbs
- Fits elongated and round bowls
- Longer 29″ braided metal cold water hose included
- Tool-free DIY installation — 20 minutes or less
Pros
- Slightly longer supply hose makes installation more flexible
- Sleek, low-profile design that looks like a traditional toilet seat
- Reliable and straightforward — no settings to memorize
- Great value for buyers who want bidet hygiene without complexity
- Zero electricity use — completely eco-friendly operation
Cons
- Cold water only — same limitation as the S101
- No heated seat, air dryer, or adjustable nozzle position
- Fewer reviews and less community data than the long-established S101
Check its current price on Amazon
Cleaning Performance: Almost Identical, But There’s a Nuance
Both the S101 and CL99 use dual retractable nozzles — one for rear wash, one for front feminine wash — and both self-clean with a high-pressure rinse before and after each use.
The spray quality is driven entirely by your home’s water pressure, so results will feel very similar on both seats.
The CL99’s jog dial control is specifically click-segmented, which some users find easier to navigate between wash modes without overshooting.
The S101’s dial is continuous, which gives smoother pressure adjustment but requires a bit more attention when switching between rear and front wash.
For pure cleaning ability, this round is essentially a tie — both nozzles perform the same core job using the same water pressure from your supply line.
If nozzle hygiene is a top concern, you’ll find both models hold up well, and they’re both easy to manually clean by simply pulling the nozzle out gently and wiping it down — a practice covered in detail in our guide to the best self-cleaning bidets.
Winner: Tie
Installation: CL99 Has a Slight Edge
Both seats install without tools or a plumber, and both connect to your toilet’s cold water supply via a T-valve.
The process is the same for each: shut off the water, remove the existing seat, mount the bidet seat, connect the T-valve, and attach the hose.
The key difference is the included hose length — the CL99 comes with a 29″ braided metal hose, while the S101 includes a 27.5″ hose.
That 1.5″ difference can matter if your water supply valve is in an awkward position or lower on the wall.
Both seats are compatible with standard two-piece toilets and most one-piece models, fitting elongated bowls (18″–19.5″) and round bowls (16″–17.75″).
For a full walkthrough of what to check before buying, our guide on bidets for existing toilets covers compatibility in detail.
Winner: CL99 (slightly longer hose gives more installation flexibility)
Comfort: Same Seat, Same Feel
The dimensions of both seats are functionally identical — both measure 20.03″ x 14.39″ x 2.55″ in elongated, with the same slim 2.55″ height profile that sits low on the toilet.
Both feature a slow-close lid and seat that prevents slamming, and both have a sturdy sittable lid rated to 330 lbs.
Neither seat offers a heated seat or warm water — both deliver ambient (room temperature) wash only.
If warm water is important to you, you’d want to look at the step-up S102 or CL129 models, which allow an optional hot water connection — or consider an electric seat like those featured in our heated bidet toilet seats guide.
For seniors or those with mobility considerations, the side-mounted dial on both models is easy to reach without stretching — a feature discussed in our bidet guide for seniors.
Winner: Tie
Design & Build: S101 Has a Stronger Track Record
On looks alone, both seats have a clean, streamlined aesthetic that mimics a standard toilet seat — neither looks like a bidet attachment.
The main visible difference is the control dial on the right side of the seat: the S101 uses a smooth chrome-accented continuous dial, while the CL99 uses a click-segmented jog dial.
Both are made from germ-resistant ABS plastic and are built to the same Brondell quality standards.
Where the S101 has the edge is sheer track record — it has been on the market longer and has accumulated thousands of reviews, giving you a much clearer picture of long-term durability than the newer CL99.
If brand confidence and proven reliability matter to you, the S101 is the safer bet — it regularly appears on lists like our best bidets under $50 roundups for exactly this reason.
Winner: S101 (proven reliability and larger community of users)
Value for Money: Extremely Close
Both seats sit at very similar price points, making this comparison a genuine toss-up on value.
The S101 benefits from being a more established product with a larger install base, which can mean easier access to community support and replacement parts like knobs.
The CL99 comes in at a comparable price and adds the slightly longer hose, which for some buyers genuinely simplifies the install.
Either way, both deliver what matters most: a clean, hygienic water wash without electricity — and both will dramatically cut your reliance on toilet paper, which is the main financial case explored in our does a bidet replace toilet paper deep-dive.
For a broader look at where these two sit in the market, our bidet toilet seat comparison chart is a useful reference.
Winner: Tie
Verdict — Which One Should You Buy?
These two bidet seats are remarkably similar — same dimensions, same ambient temperature wash, same self-cleaning dual nozzles, and the same Brondell build quality.
The differences that do exist are small but meaningful depending on your situation.
Buy the Brondell EcoSeat S101 if…
You want the most proven, well-reviewed non-electric bidet seat Brondell makes.
The S101 has been on the market for years, has thousands of real-world reviews, and is the go-to recommendation on nearly every best bidets for home use list.
If peace of mind from a large owner community matters to you, the S101 is the clear pick.
Buy the Brondell Swash CL99 if…
You want that same core Brondell experience with a slightly longer supply hose and a click-dial control you find easier to use.
The CL99 is an excellent option if your water valve sits in a position where the extra 1.5″ of hose genuinely helps.
It’s also a great choice if the CL99 happens to be priced a few dollars lower when you’re shopping — both seats are priced to compete directly with each other.
Neither choice is wrong here — you’re really picking between two very similar seats from the same brand, and both will give you the clean, paper-free bathroom experience that’s made Brondell one of the most trusted bidet brands in North America.
FAQ
Is the Brondell S101 and CL99 the exact same product?
They are extremely similar but not identical.
Both share the same dimensions, dual nozzles, ambient temperature wash, and slow-close lid.
The main practical differences are the hose length (S101: 27.5″, CL99: 29″) and the dial mechanism (S101: smooth continuous dial, CL99: click-segmented jog dial).
The S101 is the older, more established model with a much larger review base.
Can either seat connect to a hot water line for warm washes?
No — neither the S101 nor the CL99 is designed to connect to a hot water source.
Both deliver ambient (room temperature) water only.
If you want warm water without electricity, you would need to upgrade to the Brondell S102 or CL129, which include an optional hot water connection port.
For a fully heated experience with a warm seat and dryer, an electric seat like those in our heated bidet seat guide would be the next step up.
Do both seats fit round and elongated toilets?
Yes — both the S101 and CL99 are available in elongated and round versions.
Elongated models fit bowls measuring 18″–19.5″, and round models fit bowls 16″–17.75″.
Always measure your toilet bowl before ordering to ensure a proper fit.
For more compatibility guidance, our bidet basics guide walks through what to look for when sizing a seat.
How do I clean the nozzles on the S101 or CL99?
Both seats feature nozzles that self-clean automatically before and after each use — a high-pressure rinse activates whenever you move the dial through the cleaning notch position.
For a deeper manual clean, you can gently pull the nozzle out and wipe it with a soft, damp cloth and a mild cleaner.
Avoid strong chemicals, which can damage the plastic components — the same care tips apply to both models.
Conclusion
The Brondell EcoSeat S101 and Swash CL99 are two of the most closely matched non-electric bidet seats you’ll find — and honestly, either one will give you a genuinely cleaner and more eco-friendly bathroom routine the moment you install it.
The S101 wins on track record and community confidence — it’s the better pick if you want a well-reviewed, proven seat with years of real-world data behind it.
The CL99 is the pick if you prefer the click-dial control style or need the extra hose length for your specific bathroom layout.
Both dramatically cut your toilet paper use — something explored in full in our guide on bidet vs toilet paper — and both install in the same 20-minute window without any plumbing knowledge.
Whichever you choose, you’re getting solid Brondell quality at a very affordable price — and that’s a win either way.
For a broader look at your non-electric and electric options across all budgets, the bidet toilet seat comparison chart is a great next stop.
