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The verdict. The Brondell SimpleSpa SS-150 is the sensible first bidet: cheap, non-electric, genuinely thin under the seat, and installed in half an hour with no plumber and no outlet. Its 4.5-star average is honest — the spray is cold, the pressure dial is coarse at the low end, and the plastic fittings punish over-tightening. Buy it to find out whether you want a bidet at all. Buy a warm-water model instead if cold water is a dealbreaker.
Best for a first bidet on a standard two-piece toilet, installed in under half an hour
- Non-electric — no outlet needed anywhere near the toilet
- Thin profile adds minimal height under the existing seat
- Self-cleaning single nozzle retracts behind a guard when not in use
- Adjustable pressure control dial on the side arm
- Installs with the supplied T-valve and hose in 20 to 30 minutes
Why buy it: the thin body is the point — most cheap attachments lift the seat enough to notice, and this one largely does not.
What owners consistently praise
The slim profile. This is the differentiator and the reason it is called Thinline. Most attachments sandwich a plastic plate between the bowl and the seat, raising the seat enough that you notice it every time you sit down and creating a gap that catches dirt. The SimpleSpa is thin enough that a lot of owners report barely noticing the change in seat height, and it is the single most cited advantage over cheaper alternatives.
Installation. Owners with no plumbing experience describe finishing in twenty to thirty minutes with the parts in the box, and the instructions get consistently good marks. No electrical work, no drilling, nothing permanent — it comes off again if you move out of a rental.
It works. Beneath the specifications, the repeated theme in five-star reviews is simple satisfaction: cleaner, less paper used, and an immediate improvement for anyone dealing with hemorrhoids, limited mobility or post-surgical recovery. This is the most common reason people say they bought a second one for the other bathroom.
Nothing to maintain. No electricity, no seat to replace, no filter, no batteries. The nozzle rinses itself and retracts behind a guard. Long-term reviews describe years of use with no attention beyond an occasional wipe.
What owners actually complain about
Cold water is the number one complaint, and it is seasonal. The unit tees into the toilet supply, which is cold. In winter in northern states that water can arrive in the 40s Fahrenheit, and owners describe the first use of the season in vivid terms. Most acclimate; a meaningful minority do not, and go on to buy a warm-water unit, which is money spent twice.
The pressure dial is coarse at the bottom. Several owners describe the useful range as concentrated in a small part of the dial travel: a touch too far and it goes from gentle to startling. It is manageable once you learn where your setting is, but the first few uses involve experimentation that people remember.
Leaks at the connections. The recurring failure is at the T-valve or the hose ends, and it is usually installation rather than manufacture — over-tightened plastic nuts crack, and metal threads without tape weep. A slow drip behind a toilet can go unnoticed for weeks and ruin a floor, so check every joint with a dry paper towel after install and again 24 hours later.
Fixed spray angle. The nozzle position cannot be adjusted forward or back. Most owners find it aimed sensibly; some report having to shift their seating position to line things up, and that is a real ergonomic complaint rather than a preference.
Plastic build. The arm and control body are plastic, and owners comparing it directly with metal-hosed competitors say it feels less substantial. The functional consequence is limited, but it is the reason some reviewers rate it four rather than five.
Single rear nozzle only. There is no separate feminine wash position on this model. Buyers who wanted a dual-nozzle unit have to step up to a different model, and this is the most common reason for a return.
Low household pressure shows up. On a bathroom that already has weak pressure, the spray is weak too. The attachment cannot create pressure that the house does not have.
Getting the install right the first time
Three details account for nearly every bad installation in the review record. First, shut the supply valve and flush the tank empty before you disconnect anything, then hold a towel under the joint — there is always a cup of water left in the line. Second, use PTFE tape on metal threads and none on the rubber-washered connections, and tighten by hand plus a light nudge with a wrench; plastic nuts crack at exactly the point people think they are being thorough. Third, check the seat bolts. The mounting plate sits between the bowl and the seat, so the seat has to be re-seated square and snugged evenly or it will rock. Once the water is back on, dry every joint with paper towel and look again after an hour and again the next morning. A weeping connection behind a toilet is invisible until the subfloor is ruined.
Who it suits — and who should buy something else
Buy it if you have a standard two-piece toilet, you want to try a bidet without committing to an electric seat, and you would rather not raise the toilet seat noticeably.
Buy something else if cold water is a genuine dealbreaker — the LUXE Bidet NEO 320 draws warm water from the sink hot line and is reviewed here. If you want dual nozzles with a feminine wash at a similar price, look at the dual-nozzle models in best bidet attachments. The LUXE NEO 120 is the direct budget rival with a metal hose and T-valve. And if you are still deciding, are bidet attachments worth it lays out the case honestly.
Specifications
| Spec | Brondell SimpleSpa SS-150 Thinline |
|---|---|
| Type | Non-electric bidet attachment |
| Water temperature | Ambient cold only |
| Nozzle | Single, self-cleaning, retracts behind a guard |
| Controls | Side-mounted pressure dial |
| Profile | Thin — minimal added seat height |
| Power | None required |
| Install time | Typically 20 to 30 minutes, hand tools |
| Fits | Standard two-piece toilets; check one-piece and French curve seats |
| Included | T-valve, braided hose, mounting hardware |
| Maintenance | Occasional nozzle wipe; vinegar soak in hard water |
How we reached this verdict
We never buy, install or physically handle the products on this site. This assessment is built from the aggregated owner-review record — star distribution, the specific content of the one- and two-star reviews, and what owners report after a full winter — plus manufacturer specifications and expert consensus from established home and plumbing publications. For bidet attachments we weight added seat height, spray control at the low end, the quality of the water connections that can leak, and what the unit does about temperature. Full method on how we rank.
More from this hub: Bathroom · Best bidet attachments · LUXE NEO 120 review · Fixing low water pressure · How we rank
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