Wellis · StreamLife

Wellis Danube W-Flow

14′ 10″ long
One temperature
2 seats

Wellis Danube W-Flow swim spa from above, showing the lane and seats

Photography © Wellis, shown for identification

$36,999Maker's list price (MSRP)Checked Oct 2026 · wellisspa.com

No manufacturer pays us. How we make money

Updated September 2026By the HotTubFinder research desk

Room to swim. The lane, and the current you swim against.

How tall are you?

Outside of the cabinet: 14′ 10″
Open water to swim in: Not published
You, arms overhead: 7′

The maker doesn't publish the open water on the Danube W-Flow. Seats, steps and the current housing take their share of the 14′ 10″, so ask the dealer for it.

W-Flow current on 3 pumps
Wellis names the system but not what moves the water, so ask the dealer. The swim pumps run only the current. 6 speed settings.
How currents compare →
One zone, one temperature
Lap swimmers like 78 to 82°F and a hot tub runs 100 to 104, so you pick a compromise or change the setting and wait.
Is dual temperature worth it →

How much room a swimmer needs

What it costs. To buy, and to keep warm.

The swim spa: $36,999Maker's list price (MSRP)Get the price range →
Keeping it warm: No measured figure for the Danube W-Flow. A typical swim spa costs about $57 a month to keep warm.
On top: A concrete pad, a dedicated circuit, delivery and sometimes a crane. What those cost

Energy detail

No California listing we could match

California lists what a spa draws on standby, with the cover on. We found no listing that matches this model. No Wellis swim spa has one.

What decides running cost →

What owners say. About Wellis swim spas.

What they like

Semi-sunk install and insulation
A German Danube owner wrote in 2022 that the Scandinavian insulation was worth having, the water lost about 0.5–1 °C a day, and being able to sink the spa halfway is Wellis's big advantage; they had used about 4,000 kWh so far in their first year of tracking, mostly from their own solar panels. A European-spec spa.
A strong current, in a dealer's view
A US dealer wrote in 2022 that Wellis's 15-foot swim spa was among its best sellers and 'a beast' with its jet propulsion system. A seller's opinion, not an owner's.

What they complain about

Repeated finish defects on a W-Flow
A W-Flow buyer in Germany described a first unit replaced, a second delivered with acrylic defects and a third, in March 2026, with a defect pattern on the shell floor by the filter inlets, a deep scratch and chipped acrylic on the rim, leaving the spa unused for months. One owner on one platform.
Waits for parts and covers
Low-star reviews we read on September 21, 2026 include a replacement spa cover that took nine months and arrived wrong (the review doesn't name the model). Search-engine summaries of pages we couldn't open (seen September 27, 2026) add a wait of more than two months for a replacement W-Flow unit and leaks from worn jet-body seals, and name the cover buyer's spa as a Rio Grande. Treat those details as unverified.

Everything owners report about Wellis

How it’s built. In plain words.

Warranty: 10-year structure warranty. That's the median across the 161 swim spas that publish one. First owner only.
Frame and shellPartly: Stainless steel frame and fiberglass-reinforced acrylic; gauge and frame layout aren't published, and the base is described only for the Beach Club. Why it matters
Getting at the equipmentPartly: Needs 60 cm (2 ft) clear all round; standard Gecko controls, but Wellis-only jets from Hungary. Why it matters
Cover and lifterPartly: A 'Thermo cover' comes standard (not on the Beach Club); there's no lifter, and a roll-up cover costs extra. Why it matters

These findings cover the Wellis swim spa line; each names the models it applies to.

The details

Every specification51 figures, each linked to where we read it

Outside size: 14′ 10″ × 7′ 9″; 57.9" tall
Open swim length: Not published; Ask the dealer
Current: W-Flow
Swim pumps: 3; 9 HP · Current only
Water: 1,562 gal
Weight: 2,308 lb; Empty
Electrical: 240V / 50A; One circuit · 60A recommended
Seats: 2; One temperature

Size

Length: 178.35"
Width: 92.52"
Height: 57.87"
Open swim length: Not published
Water depth: Not published

Swim current

Current type: Not stated by the maker
Current system: W-Flow
Driven by: Pump
Swim pumps: 3
Swim pumps only run the current: Yes
Swim pump power: 9 HP
Speed settings: 6
Top speed: 0.4 to 2.5 km/h

Zones and seating

Dual zone: No
Dual temperature: No
Seats: 2

Water and weight

Water capacity: 1,562 gal
Dry weight: 2,308 lb
Filled weight: Not published

Therapy jets

Jets: 24
Therapy pumps: 1
Therapy pump power: 3 HP

Heat and water care

Heater: 4 kW
Heat pump: Optional
Can cool the water: Yes
Circulation pump: Yes
Filters: 2
Controls: Gecko in.yt-8 (4 kW) + in.k1000
App or Wi-Fi: Standard

Electrical

Voltage: 240 V
Minimum breaker: 50 A
Recommended breaker: 60 A
Circuits needed: 1
Total amperage: 50 A

Construction

Shell: Acrylic
Shell backing: Fiberglass reinforcement
Frame: Stainless steel
Insulation: Perimeter
In-ground install allowed: Yes
Built in: Hungary

Cover and extras

Cover included: Yes
Cover: Thermo cover
Fitness gear included: Swimming stick

Speed control · Six speed levels, from 'floating' to the hardest exercise; speeds can be set to run one…

Six speed levels, from 'floating' to the hardest exercise; speeds can be set to run one after another

Electrical notes · One 240 V 60 Hz supply: 50 A minimum, 60 A optimal.

One 240 V 60 Hz supply: 50 A minimum, 60 A optimal. On the minimum hookup the massage pump and heater can't run at the same time. The USA drawing calls for 6 AWG cable for runs up to 10 m (33 ft). Each supply needs its own dedicated breaker, a 30 mA residual-current device (GFCI), copper wiring and bonding to the house's equipotential grid; the SwimLife manual asks for a labeled emergency shut-off at least 5 ft away within sight of the spa. The 2022 drawing linked from the product page is a European 230/400 V 50 Hz document.

Where Wellis’s own figures disagree (4) · length, dry weight, structure…

Wellis’s own documents give two answers. Check yours against the quote before you sign.

Length

178.35"

wellisspa.com ↗

177" (14′ 9″)

wellisspa.com ↗

Dry weight

2,308 lb

wellisspa.com ↗

2,204.62 lb

wellisspa.com ↗

Structure

10 years

wellisspa.com ↗

7 years

wellisspa.com ↗

Equipment

3 years

wellisspa.com ↗

5 years

wellisspa.com ↗

Where these figures come from (5 Wellis documents)

Wellis on the ten things we checkCurrent, room, frame, site, running cost, service, warranty and more

Ten things that decide whether a swim spa works for you and lasts, answered for Wellis’s swim spas. Tap any for the detail.

Swim currentPump-driven currents only: W-Flow (six speeds, 50–60 cm wide) or two or three…Partly

The four W-Flow models drive the current with three 3 HP pumps (the Rio Grande and Amazon W-Flow drawings show one counter-current housing), with six speed steps and preset workouts; Wellis says the flow is 50–60 cm (20–24 in) wide and tops out at 2.5 km/h. The six Riverjet models use two or three oval swim jets with no published speed count. Wellis never says whether either current carries air.

Applies to: All 10 StreamLife models; W-Flow on four, Riverjet on six.

What this means, and how to check it →wellisspa.com ↗wellisspa.com ↗

Room to swimSwim length is published only for the Rio Grande (123.6 in); a European sheet gives…Partly

Wellis gives the Rio Grande's swim chamber as 314 cm (123.6 in) long inside a 6 m (236 in) cabinet, and its Beach Club sheet prints 2,685 mm (105.7 in) of full-depth floor before the steps, a 6.4 m² (69 sq ft) 'useful floating surface', a 1,985 mm (78.1 in) interior width and 1,265 mm (49.8 in) of water at the deep end, but no swim-area length. For the other eight it publishes only outside sizes, plus a claim that moving the Danube's filter to the far end added more than 50 cm of swim room. The Elba is 47 in tall outside, the shallowest here.

Applies to: All 10 StreamLife models

What this means, and how to check it →wellisspa.com ↗wellis.com ↗

Frame and shellStainless steel frame and fiberglass-reinforced acrylic; gauge and frame layout…Partly

Every StreamLife page lists a stainless steel frame and 'Fiberglass reinforcement' behind the acrylic. Wellis doesn't publish the steel grade or gauge, how the frame carries the long walls, or what the spa sits on (except the Beach Club's 5 mm ABS bottom cover). It quotes the structure warranty as 10 years on the product pages but 7 in its 2025 catalog.

Applies to: All 10 StreamLife models

What this means, and how to check it →wellisspa.com ↗wellisspa.com ↗

Site prepConcrete pad, or a 15 cm gravel bed for semi-inground installs; one 240 V circuit…Partly

Wellis recommends a level (0.5% maximum slope) reinforced concrete base at least 10–15 cm (4–6 in) thick outdoors, but its drawings say the semi-cabinet version needs no concrete, only a 15 cm (6 in) gravel bed, which Hydropool calls unacceptable for swim spas. Power is one dedicated 240 V circuit of 30–60 A (the dual-zone Rio Grande needs two), and on the minimum hookup the heater and massage pump can't run together.

Applies to: All 10 StreamLife models

What this means, and how to check it →wellisspa.com ↗wellis.com ↗

Running costBoard-and-foil insulation and a heat-pump option, but no published energy figure…Partly

Wellis lines the frame and floor with 'LIFE Scandinavian' insulation boards and a reflective foil rather than filling the cabinet with foam, and most models are pre-plumbed for an optional 3 kW heat pump rated down to -5 °C (23 °F). It publishes no kWh or standby figure for any swim spa, and none is in California's energy database, so running costs can't be compared on paper.

Applies to: All 10 StreamLife models

What this means, and how to check it →wellisspa.com ↗wellisspa.com ↗

Dual zoneOnly the Rio Grande is dual-zone: two chambers, two heaters, two controls, two…Yes

The Rio Grande W-Flow splits its 6 m cabinet into a swim chamber and a five-seat hot tub chamber, each with its own 4 kW heater, Gecko control pack, Smart Touch keypad and 240 V supply (40–60 A swim, 30–50 A spa). The other nine models are one body of water with two to four seats, so one temperature serves both swimming and soaking.

Applies to: Rio Grande W-Flow; the other nine StreamLife models are single-zone.

What this means, and how to check it →wellisspa.com ↗wellisspa.com ↗

Service accessNeeds 60 cm (2 ft) clear all round; standard Gecko controls, but Wellis-only jets…Partly

Wellis's drawings ask for 60 cm (about 2 ft) of service space around the spa and a 60 cm walk-around pit for recessed installs, and its warranty wants all sides clear and won't pay access costs. The controls are standard Gecko packs, but swim jets and other wet-end parts are Wellis part numbers shipped from Hungary (the Riverjet jet lists at €248.24 before VAT, 10–12 working days by DHL). Wellis says the W-Flow's mechanical parts sit outside the water, so they can be repaired without draining.

Applies to: All 10 StreamLife models

What this means, and how to check it →wellisspa.com ↗wellisspa.com ↗

Warranty termsPages promise 10 years on structure and 3 on parts, but Wellis's written US…Partly

Each StreamLife page says 10 years on the shell structure and 3 on 'engineering parts', while Wellis's June 2025 catalog gives its SwimLine series 7 years on structure and 5 on cabinet, controls and plumbing. The written US warranty covers only the original owner, excludes removal, reinstallation and access costs, and lists year terms for hot tubs only, so get the swim spa terms in writing.

Applies to: All 10 StreamLife models

What this means, and how to check it →wellisspa.com ↗wellisspa.com ↗

Cover and lifterA 'Thermo cover' comes standard (not on the Beach Club); there's no lifter, and a…Partly

Eight of the ten models list a 'Thermo cover' as standard, but Wellis doesn't say how it's built or how thick it is (the SwimLife manual only says to fasten it with its buckles); a replacement lists at $1,499. No cover lifter is offered for the swim spas, and the made-to-measure BlackTex roll-up fabric cover with number locks costs $1,500–$2,550. The Beach Club comes with no standard cover at all.

Applies to: All 10 StreamLife models

What this means, and how to check it →wellisspa.com ↗wellisspa.com ↗

Service and originBuilt in Hungary and sold through US dealers; brand-only parts ship from EuropePartly

Wellis builds in its own Hungarian plants at Dabas and Ózd and sells in the US through independent dealers, with a US office in Aventura, Florida and a warehouse in Moreno Valley, California. Warranty claims go to the selling dealer first, then Wellis. The company's revenue fell from about HUF 50 billion in 2022 to HUF 28 billion in 2023, it restructured a state-program bond in 2024 and 2025, and in 2026 it pushed a bond payment from February to June and briefly carried a selective-default rating, so ask how long your dealer has carried the brand and where parts come from.

Applies to: All 10 StreamLife models

What this means, and how to check it →wellisspa.com ↗wellisspa.com ↗

What Wellis says about itEach claim, what the documents show, and any catch

What Wellis leads with, where it covers the Danube W-Flow, and what the documents show.

Few othersTreadmill-style swim programsSalespeople lead with the W-Flow system: six current speeds and keypad workouts (endurance, intervals, random steps, cardio…Modest top speed, narrow flow

What they saySalespeople lead with the W-Flow system: six current speeds and keypad workouts (endurance, intervals, random steps, cardio, pyramid and three custom drills), pitched as a training machine for beginners and serious swimmers alike.

What the documents showThe drills are real and documented in the SwimLife manual, but only on the four W-Flow models with the Smart Touch keypad, and there are six speed steps with a top of 2.5 km/h, which is 100 m in 2 min 24 s.

Who else does itOther makers publish more speed steps (Endless Pools' E500 has 31 pace settings, Hydropool's Aquatic models ten), but we found no rival's list of preset interval drills to compare.

Applies to: Rio Grande W-Flow, Amazon W-Flow, Danube W-Flow, Amazon Grand Prix Life

The catch

Modest top speed, narrow flow. By Wellis's own figures the W-Flow runs 0.4–2.5 km/h and its flow is 50–60 cm (20–24 in) wide, against 29 in for PDC's propeller path, and Wellis doesn't say whether air is mixed in. Strong swimmers should ask to see it run at full speed.

Few othersStainless steel frameDealers point to a stainless steel frame under fiberglass-reinforced acrylic on every StreamLife model: no wood to rot, no bare…

What they sayDealers point to a stainless steel frame under fiberglass-reinforced acrylic on every StreamLife model: no wood to rot, no bare steel to rust.

What the documents showThe material is stated on every product page and in the catalog, but a frame is only as good as its design, and Wellis publishes no grade, gauge or layout. 'No wood to rot' is a dealer line, not a Wellis statement, and Wellis's own parts lists include wood screws and washers 'for wood connection'.

Who else does itAmong the swim spa frames we researched, Wellis's is the stainless steel one; the others are galvanized steel (Endless Pools E-Series, Jacuzzi J-16), wood (Endless Pools R200) or molded composite (Bullfrog's EnduraFrame).

Few othersSink it halfway, skip concreteThe semi-cabinet design lets the lower ABS casing sit sunk in a 15 cm (6 in) gravel bed with no concrete pad, pitched as avoiding…

What they sayThe semi-cabinet design lets the lower ABS casing sit sunk in a 15 cm (6 in) gravel bed with no concrete pad, pitched as avoiding costly, slow installation work.

What the documents showIt's in Wellis's own installation drawings, and so are the conditions: only the part below the acrylic rim may be sunk, a 60 cm (2 ft) service pit with drainage and ventilation must surround it, and the owner pays if the spa ever has to be lifted out.

Who else does itMaster Spas asks for at least 4 in of reinforced concrete and Hydropool 6 in over gravel; Wellis's drawings explicitly allow gravel alone for the semi-cabinet version.

Applies to: Amazon, Danube and Rio Grande models (semi-cabinet); Elba and Beach Club have their own semi-inground or inground cabinets

Few othersPrices posted onlineWellis shows a US list price for every swim spa, from $25,999 (Elba Deluxe) to $50,999 (Rio Grande W-Flow), so shoppers can compare…Delivery, install and options extra

What they sayWellis shows a US list price for every swim spa, from $25,999 (Elba Deluxe) to $50,999 (Rio Grande W-Flow), so shoppers can compare before a showroom visit.

What the documents showThe prices are on the StreamLife and product pages. They are list prices, though, and the pages route you to a quote.

Who else does itEndless Pools also posts swim spa MSRPs ('starting at $55,999' for the E500); many dealer-sold brands show none.

The catch

Delivery, install and options extra. Several pages say 'Book an appointment to request a price for delivery', and common add-ons are priced separately: the heat pump step $2,150, the BlackTex rollcover $1,500–$2,550 and swim spa stairs $1,500.

3 more Wellis selling points

CommonAward-winning Danube W-FlowDealers mention that the Danube W-Flow was recognized by the UK buyer's-guide magazine What Swimspa?

What they sayDealers mention that the Danube W-Flow was recognized by the UK buyer's-guide magazine What Swimspa? in 2022.

What the documents showThe recognition is real per trade press, but it's four years old, from a UK consumer magazine rather than a test, and for a European-spec spa.

Who else does itThe magazine publishes 'Best Buy' and 'Approved' lists, and the same 2022 release also honored a Wellis hot tub.

Applies to: Danube W-Flow

Few othersBuilt by a big European makerWellis sells itself as Europe's leading spa maker with '100% European manufacturing' in its own Hungarian plants.Parts and support run through Hungary

What they sayWellis sells itself as Europe's leading spa maker with '100% European manufacturing' in its own Hungarian plants.

What the documents showThe Dabas and Ózd plants are real, but 'leading' and 'largest' are Wellis's own words, and the company has shrunk sharply since 2022.

Who else does itMost swim spas sold in the US are built in North America (Master Spas in Indiana, PDC in Pennsylvania, Hydropool in Ontario, Coast in British Columbia).

The catch

Parts and support run through Hungary. Wellis's factory parts shop prices swim jets in euros (the Riverjet jet is €248.24 before VAT) and ships by DHL in 10–12 working days, and Wellis USA publishes no US parts channel. Revenue fell from about HUF 50 billion in 2022 to 28 billion in 2023, its bond was restructured in 2024 and 2025, and a bond payment due in February 2026 was pushed to June before being paid.

Common10 years on the shell structureEvery StreamLife page shows 10 years on the shell structure and 3 years on engineering parts.Not in the written US warranty

What they sayEvery StreamLife page shows 10 years on the shell structure and 3 years on engineering parts.

What the documents showWellis's own catalog and written warranty don't back the 10-year figure for swim spas, and the published terms are thin on labor.

Who else does itMaster Spas gives its H2X Trainer and Challenger 10 years on structure; PDC gives the TruSwim TSX19 35 years and Artesian lifetime.

The catch

Not in the written US warranty. Wellis's June 2025 catalog gives its SwimLine series 7 years on structure, and its written US warranty lists year terms for hot tubs only. The terms it does publish end if the spa is sold and exclude removal, reinstallation and access costs.

Warranty10 yr structure · 3 yr equipment

Years of cover as Wellis publishes them. Who pays labor, travel and removal matters as much as the years, so read the card before you sign.

Structure: 10 years
Equipment: 3 years
Plumbing: 5 years
Cabinet: 5 years
Transferable: No

What the card saysCovers the original buyer only and ends if the spa is sold or moved outside the country of purchase.

Covers the original buyer only and ends if the spa is sold or moved outside the country of purchase. Excludes the labor, transport and other costs of removing and reinstalling the spa or installing a replacement, and any cost of gaining access; all sides must be clear for service. Excludes freezing, improper installation or wiring, chemical damage, sun exposure without protection, commercial use and repairs by anyone other than an authorized representative. Claims go through the selling dealer, then the manufacturer; parts may be replaced with reconditioned ones and a repair carries only the remaining term. These general terms are on the US warranty page, whose year-by-year lines cover PeakLife and CityLife hot tubs only.

Read Wellis’s warranty document ↗