WaterRower
WaterRower Oak Rowing Machine with S4 BLE Monitor
LiftEvidence pick: Best Water Rower
Handmade US hardwood frame and a water flywheel that sounds and feels like moving water
- Best for
- Living rooms and shared spaces where a rower must look good, run quietly and stand upright when not in use.
- Skip if
- Anyone who wants fine resistance adjustment between sets or data directly comparable with club ergs.
- For less
- Sunny Dual-Rail Magnetic (mid-range) — A 50 in dual rail, 16 quiet magnetic levels and upright storage for about a third of a Concept2
WaterRower
Water
Stores upright
Amazon customer rating
4.7/5 from 555 ratings
Checked October 7, 2026
- Resistance
- Water
- Storage
- Stores upright
- LiftEvidence score
- 8.4 / 10
- Price band
- Premium
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Quick verdict
LiftEvidence editorial assessment
A water rower with a solid oak frame made in the US, a WaterFlywheel whose resistance rises with your effort, the S4 BLE monitor and upright storage. Owners describe a soothing, quiet water sound and furniture-quality looks. Resistance is set by how much water is in the tank, not by a dial, and the S4 data is less standardised than a Concept2’s.
Specifications
Source: manufacturer listing
As stated by the manufacturer (website or Amazon listing; conflicts are noted). Information that was not available or could not be confirmed is omitted or marked “Not reliably published”.
- Brand
- WaterRower
- Model
- Oak 230 S4
- ASIN
- B00KXD5HPC
- Resistance
- Water
- Resistance detail
- WaterFlywheel; load set by water level and stroke effort
- Rail
- Hardwood twin rail
- Maximum inseam / user height
- Not reliably published
- User capacity
- 700 lb
- Monitor & connectivity
- S4 BLE; WaterRower Connect and CITYROW
- Storage
- Stores upright
- Dimensions
- 87.75 × 22.25 × 20 in (listing table; the listing text says about 82 in long)
- Machine weight
- 84 lb
- Subscription
- Optional (CITYROW)
- Warranty
- Listing states a 1-year warranty.
Sources: Amazon.com listing. Checked October 7, 2026.
Who it suits
LiftEvidence editorial assessment
Best suited to
- Quiet Homes
- Small Spaces
- Serious Training
Living rooms and shared spaces where a rower must look good, run quietly and stand upright when not in use.
Less suitable for
Anyone who wants fine resistance adjustment between sets or data directly comparable with club ergs.
Strengths and drawbacks
LiftEvidence editorial assessment
Strengths
- Natural water stroke
- Quiet and attractive
- Stores upright
- Made in the US
Drawbacks
- Resistance changed only via water level
- Listing shows only a 1-year warranty
- Dimension figures conflict on the listing
- Expensive
Stroke feel, noise and durability
LiftEvidence editorial assessment
Our interpretation of the specifications, stated construction and recurring customer feedback. We have not independently tested this product.
- Stroke feel
- Excellent
- Data & pacing
- Good
- Quietness
- Excellent
- Stability
- Excellent
- Build quality
- Exceptional
- Durability
- Exceptional
Evidence and product claims
Scientific evidence, independent testing and manufacturer claims are different kinds of information and are not equivalent.
Independent testing
No independent laboratory testing of this model identified.
Manufacturer claims
Commercial-grade components; more than 100,000 machines sold into commercial gyms (manufacturer listing).
Marketing statements; not independently verified.
Customer feedback
Source: Amazon customer reviews · checked October 7, 2026
Amazon customer rating
4.7/5 from 555 ratings
Checked October 7, 2026
Customer ratings reflect user experience on Amazon. They are not LiftEvidence ratings and are not controlled evidence.
Recurring themes
Owners call it an excellent machine with a beautiful wooden finish, straightforward assembly and quiet operation; many describe the sound of the water as soothing and consider it worth the investment.
Commonly praised
- Looks
- Quiet, soothing water sound
- Easy assembly
Editorial scores
LiftEvidence editorial assessment · 0–10
8.4/ 10 · LiftEvidence score (weighted)
- Stroke quality · 25%
- 9.0
- Build & durability · 20%
- 9.0
- Monitor & data · 15%
- 7.5
- Ergonomics & fit · 10%
- 8.5
- Home practicality · 10%
- 9.0
- Value · 20%
- 7.5
Editorial judgements from the manufacturer's specifications, stated construction and recurring customer-review themes, using the same criteria for every product in this category. They are not measurements, and we have not tested this product. How we evaluate
Compare with other rowing machines
- Concept2 RowErg
Air · Separates into two pieces; caster wheels
- Hydrow Origin
Magnetic · Stows upright
- Sunny Dual-Rail Magnetic
Magnetic · Stores upright; transport wheels
- Merach R280 Water
Water · Folds 180°; wheels
- Merach Q1S
Magnetic · Not reliably published
- Merach RS3 Scull
Magnetic · Not reliably published
- Sunny Compact Hydraulic
Hydraulic · Light enough to lean or carry
Where to check the price
LiftEvidence is not the seller. These links lead to the Amazon listing for this model; availability differs by country.
WaterRower Oak S4
Check price on Amazon