Cal Spas · Swim Spa X-Series

Cal Spas Depth-X F-1680X

16′ 8″ long
Air-injected jets
One temperature
4 seats

Cal Spas Depth-X F-1680X swim spa seen from the side

Cal Spas Depth-X F-1680X swim spa from above, showing the lane and seats

Photography © Cal Spas, shown for identification

Price on request

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: 16′ 8″
Open water to swim in: 9′ 5″
You, arms overhead: 7′

The lane leaves you 2′ 5″ to kick.

5 air-injected swim jets on 3 pumps
Air is mixed into the stream: it feels strong on your palm but gives you less water to pull against. The same pumps also feed the seats, so current and massage share the power.
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: Price on requestGet the price range →
Keeping it warm: No measured figure for the Depth-X F-1680X. 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. Seven Cal Spas swim spas have one, from 405 to 474 W.

What decides running cost →

What owners say. About Cal Spas swim spas.

What they like

Daily swims and family use at home
Owners describe swimming at home in private instead of at public pools, buying one because a spouse wanted it (the spouse likes it, they say), and using a cabin spa two or three times a week. An F-1325 owner who swims daily with a partner says there is little to dislike after six months.
Delivery crews and easy installs
Several owners praise the crews: one describes Cal Spas hauling away an old swim spa with dollies at no charge, others an hour-and-a-half install and a salesperson who arranged a test of the product.

What they complain about

Too short to swim properly
A 5'10" owner says they have a foot or less of room before hitting the back and wish they had bought a bigger model; a 6'1" F-1325 owner says the 14-foot model without bench seating would have suited them better.
Electronics failures and warranty pushback
An owner says the main board failed after four and a half years and Cal Spas refused the claim, blaming the licensed electrician; another reports trouble with a control pad and speakers that went out and were not under warranty.

Everything owners report about Cal Spas

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: A treated-wood frame and a shell Cal Spas says is reinforced with steel and wood; no laminate thickness is published. Why it matters
Getting at the equipmentYes: Ordinary pumps behind screw-on panels and no foam in the way; keep 3 feet clear on every side. Why it matters
Cover and lifterPartly: A 5-to-3-inch locking foam cover is included; a lifter isn't, and cover claims turn materials-only after 90 days. Why it matters

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

The details

Every specification55 figures, each linked to where we read it

Outside size: 16′ 8″ × 7′ 9″; 63" tall
Open swim length: 9′ 5″; 6′ 6″ wide, in a 16′ 8″ cabinet
Current: Air-injected jets; Swim Jet System V · 5 jets
Swim pumps: 3; 18 HP peak · Shared with the seats
Water: 2,650 gal
Weight: 24,565 lb; Full
Electrical: 240V / 60A; One circuit
Seats: 4; One temperature

Size

Length: 200" (16′ 8″)
Width: 93" (7′ 9″)
Height: 63"
Open swim length: 113" (9′ 5″)
Open swim width: 78" (6′ 6″)
Water depth: Not published

Swim current

Current type: Jets
Current system: Swim Jet System V
Driven by: Pump
Swim jets: 5
Swim pumps: 3
Swim pumps only run the current: No
Swim pump power (brake): 18 HP
Air mixed into the current: Yes

Zones and seating

Dual zone: No
Dual temperature: No
Seats: 4

Water and weight

Water capacity: 2,650 gal
Dry weight: 2,450 lb
Filled weight: 24,565 lb

Therapy jets

Jets: 80
Therapy pumps: 1
Therapy pump power (brake): 6 HP

Heat and water care

Heater: 5.5 kW
Filters: 2
Filter area: 100 sq ft
Sanitation: Ozone
Controls: BP20X / Touch 4 Plus
App or Wi-Fi: Optional

Electrical

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

Construction

Shell: Acrylic
Shell backing: Patented 5-layer laminate design incorporating reinforced steel and wood ("Fiber Steel")
Frame: Wood
Base: ABS pan
Insulation: Perimeter
Built in: USA

Cover and extras

Cover included: Yes
Cover: Cal Armor (Weather Shield), 5" to 3" taper; gray, dark brown or black

Doesn’t have: circulation pump, cooling, cover lifter.

Speed control · On/off swim jets with on/off air valves and adjustable nozzle angle; optional…

On/off swim jets with on/off air valves and adjustable nozzle angle; optional variable-speed swim pumps

Electrical notes · Hard-wired to a dedicated GFCI-protected circuit with copper THHN wire (no aluminum)…

Hard-wired to a dedicated GFCI-protected circuit with copper THHN wire (no aluminum); wire runs over 100 ft must go up one gauge. Wiring any other way voids the warranty and must be done by an electrical contractor and inspected. An optional 5.5 kW auxiliary heater needs one more 40 A GFCI circuit. The Dynamic Flow Control variable-speed option changes the equipment to Gecko; Cal Spas' Gecko variable-speed manual lists 60 A for an IN.YE5 pack with 1-4 pumps, while the pre-delivery guide lists 50 A for IN.YE5 with 2-3+ pumps.

Fitness gear included · 27-inch stainless steel exercise bar, floor-mounted swim lane marker, fitness anchors…

27-inch stainless steel exercise bar, floor-mounted swim lane marker, fitness anchors, tether anchor

Where Cal Spas’s own figures disagree (7) · water capacity, dry weight, filled weight…

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

Water capacity

2,650 gal

calspas.com ↗

2,775 gal

calspas.com ↗

Dry weight

2,450 lb

calspas.com ↗

2,850 lb

calspas.com ↗

Filled weight

24,565 lb

26,008 lb

Jets

Swim jets

Minimum breaker

60 A

calspas.com ↗

15 A

calspas.com ↗

Shell backing

5-layer

calspas.com ↗

7-layer

calspas.com ↗

Where these figures come from (6 Cal Spas documents)

Cal Spas 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 Cal Spas’s swim spas. Tap any for the detail.

Swim currentJets, not a propeller: two river jets on the 13- and 14-foot models, five on the…Partly

Every Cal Spas swim spa makes its current with jets on 6-brake-horsepower pumps: two "rip current" jets on the 13- and 14-foot models, plus three "power stream" jets on the 16- to 18-foot ones. Air valves and aimable nozzles change the feel, but Cal Spas publishes no speed settings, flow or current width, and variable-speed pumps are an extra-cost option. On some models a swim pump also runs seat or wall jets, and the 13-foot Family Fun is, in Cal Spas' own words, "not designed as a fitness spa".

Applies to: All nine current models; pump sharing differs by model as described.

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

Room to swimCal Spas prints the swim area on its drawings: about 8 to 11.5 feet of open water…Partly

Cal Spas' 2026 drawings label the swim area: 96 inches on the 13-foot models, 101 on the 14-foot, 138 on the 16-foot Commander, 113 on the 16-foot Depth-X and 95 on the 18-foot Olympian, whose hot tub takes the rest. That is 45 to 69 percent of the cabinet length. Water depth isn't published; the cabinets are 51 inches tall, 63 on the Depth-X.

Applies to: All nine current models.

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

Frame and shellA treated-wood frame and a shell Cal Spas says is reinforced with steel and wood…Partly

Cal Spas builds its swim spas on a pressure-treated wood cabinet frame with galvanized steel fasteners, corner gussets and vertical bracing, under an acrylic shell it calls "Fiber Steel", a patented laminate reinforced with steel and wood. It gives the laminate as 5 layers on the swim pages and 7 on its brand page, publishes no patent number or thickness, and its warranty covers the wood frame for 2 years against 10 for the shell structure. Filled, these spas weigh about 15,000 to 26,000 pounds by Cal Spas' own figures.

Applies to: All nine current models.

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

Site prepEvery Cal Spas swim spa needs a crane and a 4-6 inch slab; its 150 lb/sq ft deck…Partly

Cal Spas' 2026 pre-delivery guide says all swim spas must be set by crane, which isn't part of standard delivery, on a level 4 to 6 inch slab that extends a foot past the spa, with 3 feet clear on every side. Its manual gives other slab figures, and its 150-pounds-per-square-foot rule for decks is below its own swim spas' filled weight spread over their footprint, about 153 to 190 pounds before anyone gets in. Power is one 50- or 60-amp 240-volt circuit, two circuits on the Olympian.

Applies to: All nine current models.

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

Running costWall-and-floor insulation, not full foam; California's tests put the swim spas at…Partly

Standard insulation is Thermo-Shield panels in the cabinet walls plus an ABS-lined insulated floor; full foam is an upgrade. California's listings put the swim spas at 405 to 474 watts of standby, 68 to 75 percent of the limit for their size, roughly 3,550 to 4,150 kWh a year before any swimming; those tests used a 4-to-2.5-inch cover, not the 5-to-3-inch cover now standard, and the Depth-X has no listing. Cal Spas says the spas can't cool the water.

Applies to: All nine models; no California listing for the Depth-X F-1680X.

What this means, and how to check it →calspas.com ↗cacertappliances.energy.ca.gov ↗

Dual zoneOne dual-zone model, the 18-foot Olympian: a separate 3-seat hot tub on its own…Partly

The Olympian F-1868DZ walls off a three-seat hot tub with its own control pack, pump, blower, filter and ozonator, so the swim side can sit at 80°F while the hot tub runs up to 104°F. The hot tub side runs on a separate 15-amp, 120-volt circuit, which can deliver at most 1.8 kW even though Cal Spas lists a 5.5 kW heater for it, and the swim lane shrinks to 95 inches. The other eight models are single-zone.

Applies to: Olympian F-1868DZ only; the other eight models are one body of water.

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

Service accessOrdinary pumps behind screw-on panels and no foam in the way; keep 3 feet clear on…Yes

The current comes from standard 6-brake-horsepower pumps and Balboa or Gecko control packs, not a hydraulic drive, and the standard wall-panel insulation leaves the plumbing reachable. Cal Spas makes 3 feet of clearance on every side mandatory, shows where each model's pumps and control box sit, and warns that cranes, deck removal or other work to reach the equipment are billed to the owner. Its warranty allows only designated representatives and genuine Cal Spas parts.

Applies to: All nine current models.

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

Warranty terms10 years on structure and 5 on equipment, but proration, fees and a…Partly

Cal Spas' 2026 swim spa warranty reads 10 years structural, 7 surface, 5 each on equipment, plumbing and cabinet, 3 on the cover and 2 on jets, diverter valves and the wood frame, with labor included. The dealer may still charge travel and diagnostic fees, you pay freight, cranes and access, a spa that can't be repaired is replaced at 1% of current retail per month you've owned it, and coverage ends if you sell or move it.

Applies to: All nine current models.

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

Cover and lifterA 5-to-3-inch locking foam cover is included; a lifter isn't, and cover claims turn…Partly

Every model ships with a tapered 5-to-3-inch Cal Armor cover with locking tie-downs, and the Olympian gets one per zone; Cal Spas describes rigid foam and metal but not how the cover folds. No lifter is listed as standard, and Cal Spas sells manual and hydraulic-assist lifts separately without saying which fit swim spas. The cover is warranted 3 years, but after 90 days a claim pays only for a new vinyl sleeve or foam, and California's energy tests used a thinner 4-to-2.5-inch cover.

Applies to: All nine current models.

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

Service and originMade in the USA by a Pomona, California company and serviced through its dealers…Partly

Cal Spas says its spas are made in the USA from components sourced worldwide; its only published address is a 40-acre headquarters in Pomona, California. Warranty work goes through the selling dealer or a Cal Spas-designated representative, who may charge travel and diagnostic fees, and Cal Spas publishes no dealer count or service map. Recent swim spa owners on a review site describe claims denied or stalled and parts on back order.

Applies to: All nine current models.

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

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

What Cal Spas leads with, where it covers the Depth-X F-1680X, and what the documents show.

CommonTwo to five swim jets, adjustable feelCal Spas sells its Hydro-Pro Swim-Mill current: two river ("rip current") jets on the 13- and 14-foot models and two river jets…Shared pumps on some models, variable speed extra

What they sayCal Spas sells its Hydro-Pro Swim-Mill current: two river ("rip current") jets on the 13- and 14-foot models and two river jets plus three power stream jets on the 16- to 18-foot ones, on 6-brake-horsepower pumps, with air valves and aimable nozzles to set the resistance.

What the documents showThe hardware is real and documented down to a pump color key on each drawing, but Cal Spas publishes no flow, width or speed for the current, the standard pumps have no stated speed count, and on several models a swim pump also feeds seat or wall jets.

Who else does itJet currents on two or more pumps are the norm among jet swim spas: Bullfrog uses two swim jets, Hydropool two 5 hp swim pumps, and Master Spas six airless jets on its Challenger.

The catch

Shared pumps on some models, variable speed extra. Cal Spas' own 2026 drawings show the Family Fun's two pumps also run its seats through diverters, the Commander's third swim pump also feeds the 27-jet standing wall, and the Depth-X's splits three ways. Speed control on the standard pumps comes down to on/off jets, air valves and nozzle angle; fine control needs the extra-cost Dynamic Flow Control option, which switches the equipment to Gecko. The Family Fun's manual says it "is not designed as a fitness spa".

Few othersStand-up massage wall on the big modelsThe Commander, Commander-X, Depth-X and Olympian add a wall of 27 to 30 stainless "vertical AAT" jets you lean against standing up…

What they sayThe Commander, Commander-X, Depth-X and Olympian add a wall of 27 to 30 stainless "vertical AAT" jets you lean against standing up, which Cal Spas calls Vertical Hydrossage and lists as standard on the F-1655 and F-1655X.

What the documents showThe wall is on the spec tables and drawings, but on the Commander models and the Depth-X it shares a pump with the power stream swim jets through a diverter.

Who else does itNone of the other swim spa makers we researched describes a standing jet wall; we did not survey every rival's option list, so treat this as uncommon rather than proven unique.

Applies to: Commander F-1655, Commander-X F-1655X, Depth-X F-1680X, Olympian F-1868DZ

Few othersDepth-X: a 63-inch-tall swim spaThe Depth-X is a 16-foot swim spa in a 63-inch-tall cabinet, a foot taller than Cal Spas' other models, sold as powerful enough for…Sold on depth, but Cal Spas publishes no water depth

What they sayThe Depth-X is a 16-foot swim spa in a 63-inch-tall cabinet, a foot taller than Cal Spas' other models, sold as powerful enough for expert-level swimmers.

What the documents showThe cabinet height is published, but water depth is not, and Cal Spas' own documents disagree on its gallons, weight and electrical supply.

Who else does itFew swim spas stand over 60 inches: Master Spas' deep H2X "D" models are 60 inches tall and Endless Pools' E500-58 is 58.

Applies to: Depth-X F-1680X

The catch

Sold on depth, but Cal Spas publishes no water depth. Cal Spas publishes no water depth, only the 63-inch cabinet height. Its own documents disagree on gallons (2,650 vs 2,775) and filled weight (24,565 vs 26,008 lb), and its marked swim area is 113 inches, shorter than the 138-inch lane of the same-length Commander.

Common"Industry's Best Warranty"Cal Spas bills its coverage as the industry's best: on the swim spas, 10 years on structure, 7 on the surface and 5 each on…Proration, fees, and it ends if you sell or move

What they sayCal Spas bills its coverage as the industry's best: on the swim spas, 10 years on structure, 7 on the surface and 5 each on equipment, plumbing and cabinet, with parts and labor included.

What the documents showThe years are middle of the pack, and the fine print (proration, fees, 2 years on jets and frame, no transfer) makes it weaker than the banner.

Who else does itTen-year structure terms are common: Master Spas' 2026 H2X Trainer and Challenger card gives 10, 7 and 5 years, and PDC lists 35 years on its TruSwim structure.

The catch

Proration, fees, and it ends if you sell or move. A spa Cal Spas can't repair is replaced at 1% of current retail per month you've owned it after month six, plus removal, shipping and installation. Dealers may charge travel and diagnostic fees, and parts freight and access (including cranes) are yours. Jets, diverter valves and the wood frame get 2 years, and coverage ends on sale or relocation.

2 more Cal Spas selling points

CommonBuilt in the USA, shipped fastCal Spas says its spas are made in the USA from the finest components around the world, at a 40-acre Pomona, California…

What they sayCal Spas says its spas are made in the USA from the finest components around the world, at a 40-acre Pomona, California headquarters, with lead times of five days or less.

What the documents showCal Spas qualifies its own US-made claim with imported components, names no plant apart from its headquarters, and the five-day lead time is its own unverified claim.

Who else does itSeveral swim spa makers build in North America: Master Spas in Fort Wayne, Indiana, PDC in Williamsport, Pennsylvania and Hydropool in Mississauga, Ontario.

Common"Fiber Steel" shell, strength underneathCal Spas says its patented Fiber Steel laminate, reinforced with steel and wood, makes one of the strongest shells in the world…

What they sayCal Spas says its patented Fiber Steel laminate, reinforced with steel and wood, makes one of the strongest shells in the world, over a pressure-treated frame with galvanized fasteners, gussets and bracing.

What the documents showNo patent number, laminate thickness or load test is published, the layer count differs between Cal Spas' own pages (5 versus 7), and the frame is wood.

Who else does itFiberglass-backed acrylic is industry standard, and wood frames are used elsewhere too (Endless Pools' R200); Hydropool promotes its steel frames as having nothing to rot.

Warranty10 yr structure · 5 yr equipment · 5 yr labor

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

Structure: 10 years
Shell surface: 7 years
Equipment: 5 years
Plumbing: 5 years
Cabinet: 5 years
Labor: 5 years
Transferable: No

What the card saysParts and approved labor are covered for each line's term, but the servicing dealer may charge a travel/service fee and a diagnostic fee, the owner…

Parts and approved labor are covered for each line's term, but the servicing dealer may charge a travel/service fee and a diagnostic fee, the owner pays freight on parts, and providing access (including any crane or heavy machinery, and rebuilding decks or structures against the spa) is the owner's cost; 3 feet of clearance on every side is mandatory. A spa judged non-repairable is replaced with one of equal or lesser value, and after the first 6 months the owner pays 1% of current retail per full month owned, plus removal, shipping and installation. Coverage ends on transfer to a new owner or relocation of the spa; void for repairs by anyone other than a designated representative, non-genuine Cal Spas parts, chemical abuse, commercial use, improper electrical installation or an unlevel foundation. Freeze damage, UV bulbs older than 10 months and the filter are excluded. After 90 days a cover claim pays only the material cost of a new vinyl sleeve and/or foam, shipping excluded. Other factory-installed components, including the wood frame, jets and diverter valves, carry 2 years; ozone/UV and LED lighting 2 years; sanitation (salt/bromine) and sound 1 year.

Read Cal Spas’s warranty document ↗