Bullfrog Spas · STIL
Bullfrog Spas STIL5 hot tub
Four seats, all of them upright (no lounger). Suits a couple or a small family. It plugs into a standard 120V outlet.
- Seats: 4 seats
- Lounger: No lounger
- Size: 6′ 10″ × 5′ 7″
- Power: 120V plug-in or 240V
$16,695–$18,595STIL starting prices (MSRP)Checked Oct 2026 · bullfrogspas.comWhat it costs
Free. Your price range, then one dealer near you.
Sit in it. 4 seats, no lounger.
What it costs.
Price
$16,695–$18,595STIL starting prices (MSRP)Checked Oct 2026 · bullfrogspas.comBullfrog prints a starting-MSRP range for each series, not a price per model. A per-model price comes only from its Design Studio, after a form, which we don't use.
To keep it hot
Standby in California’s test, at the US average 18.19¢ per kWh. Heating fresh water and using the jets add to it.
What owners say.
From owner reviews and forums across Bullfrog Spas tubs, not just this model.
Owners like
- JetPak modularity and interchangeability
- Massage and comfort
- Energy efficiency in practice
Owners complain about
- JetPak seal and gasket failures
- Service hinges on the selling dealer
- Delivery delays and damaged-on-arrival units
All themes, and complaint records
Owners like
- JetPak modularity and interchangeability. The brand's defining feature and its most praised. Owners value swapping jet configurations between seats without draining, matching each seat to a person, and buying different JetPaks later. Several owners say this alone is why they chose Bullfrog over Jacuzzi, Hot Spring or Sundance.
- Massage and comfort. Consistent praise for how the massage feels. Every review that mentions it scored 4 or 5 stars.
- Energy efficiency in practice. Most owners report running costs lower than expected, helped by the reduced-plumbing design; several report multi-year ownership with low bills. One 6-year A Series owner on ConsumerAffairs calls it energy efficient and easy to care for.
- Dealer and delivery experience done well. Where the dealer is good, owners single out the salesperson by name, praise the delivery crew, and report fast JetPak warranty swaps with a loaner supplied. One A6L owner reports replacement JetPaks at the door in about a week.
- Build quality and longevity. Praise for the synthetic (non-wood) frame and reduced plumbing runs. Long-term owners report tubs still running well at 6 and 15 years; one ConsumerAffairs reviewer reports a 2011 purchase still running with only minor repairs.
- Manufacturer responds directly when escalated. An official 'Bullfrog Spas Support' account posts on the whatsthebest-hottub forum, asks owners for dealer and serial number, and takes issues offline. Forum regulars and dealers repeatedly say calling Bullfrog corporate at 801-565-8111 resolves cases a stalling dealer will not, and owners who did so report it worked.
Owners complain about
- JetPak seal and gasket failures (leaks and buzzing at the seat). The JetPak drops into a receptacle sealed by a foam O-ring. Owners report the O-ring unseating or distorting, which shows up as water shooting up behind the JetPak and a loud buzz or vibration in that seat under pump pressure. Bullfrog's field fix was 1/16-inch plastic spacer rings between JetPak and gasket, and later a redesigned (blue) O-ring.
- Service hinges on the selling dealer. The most common complaint on independent platforms. Warranty service runs through the selling dealer, so owners' experience swings with dealer quality: unreturned calls, farmed-out service contractors, and owners stranded when a dealer closes. One 2026 A6L owner reports the selling dealer shut down and the remaining dealers are over an hour away.
- Delivery delays and damaged-on-arrival units. Long waits between order and delivery, poor status communication, and units arriving with cracked corner panels, missing or wrong covers, missing filters, or loose control panels. Concentrated in the 2020 to 2021 demand spike but still present in 2026 reviews.
- Cover fit, durability and warranty term. Fit: a 2023 A6L Select owner received an 8-inch-radius cover for the redesigned 4-inch-radius 2023 A Series shell, leaving corners exposed. Wind: an M9 owner reports the cover repeatedly blown off and the lifter tearing the corner panels, blamed on short skirts and weak clips.
- Cabinet panel warping, bowing and detaching. Side and back panels bowing outward, sliding down, warping with dent-like suction marks, or falling off when first removed. Seen on both premium A Series and value Calm models, and on brand-new units.
- Acrylic shell crazing and delamination (2015 to 2017 builds). An A8L under three years old had its acrylic layers separate. The dealer called it crazing; Bullfrog accepted it as a material defect and agreed to replace the spa, then charged an $1,800 'upgrade fee' for newer technology, negotiated to about $1,500 with freight and setup waived.
- Filtration capacity and water clarity. Recurring 2026 complaint that the filter is undersized for the tub: persistently cloudy water despite normal chemistry and light bathing load, and high filter cartridge cost (an M9 owner cites just under $100 for a 2-pack). Two 2026 X6R owners separately report foul smell and black residue in the plumbing.
- Topside control panel and control-board failures. Topside and glass control panels failing repeatedly (one STIL7 owner reports a fourth set installed and failing, plus a swipe-to-clean screen that freezes), motherboard replacements on new units, and an A Series auxiliary control pad whose trim ring is held on by double-sided tape and lifts.
Bullfrog Spas as a company
- 1.5 of 5 on ConsumerAffairs from 58 reviews.
- The Better Business Bureau lists 31 complaints in three years and rates the company A.
Bullfrog Spas reviews and complaintsHot tub reviews by brand
How it’s built. The 8 build checks, in plain words.
The same eight checks we run on every brand, answered from Bullfrog Spas’ own documents. Tap one for what it means and the evidence.
Self-supporting shellDoes the shell hold itself up?No
A molded ABS frame carries the water weight, not the shell.
Bullfrog builds the structure into a separate ABS EnduraFrame with extra supports under high-use seats, then fully encases the acrylic shell in closed-cell foam. The shell warranty promises no leaks rather than structural integrity. Full foam also means a tech has to cut foam away to reach a plumbing leak.
Applies to: All series, which share the EnduraFrame structure and full-foam insulation
Clamped plumbingAre the hoses glued and clamped?Not published
Bullfrog Spas doesn't publish this. Ask the dealer.
Bullfrog never says whether its joints are glued PVC or barbed fittings with clamps, and the manual only tells you to hand-tighten a leaking fitting. One outside site claims glued and clamped lines, with nothing to back it up. Ask a dealer to open the equipment bay and show you.
Applies to: All models
Manifold-fed jetsDoes each jet get its own line?Partly
Each seat feeds from a manifold, but seats may run in series.
Every JetPak gasket seats into the H2Air manifold instead of splicing into a hose run, and the jets inside a pack feed off that manifold. Bullfrog's own older patent shows the seat manifolds chained one to the next along the supply line. Whether current tubs still do that is not published.
Applies to: JetPak lines (M Series, A Series, STIL and Swim Series); plumbing on X Series and Calm is unknown
Standard partsCan any repair tech buy the parts?Partly
Standard controls and pumps, but JetPaks are Bullfrog-only.
Boards, topside panels, pumps, motors, jets and filters are industry-standard parts any tech can buy. The JetPaks, the H2Air manifold and the frame are patented Bullfrog designs that independent retailers do not stock. Routine repairs stay cheap and easy, while anything JetPak-related goes back through the dealer.
Applies to: All models
Compression-fitted jetsAre the jet bodies held by a nut, not glue?Partly
Shell jets bolt in with a nut; jets inside JetPaks aren't documented.
Bullfrog's parts store sells shell jet bodies with nuts and gaskets for fixed-jet seats. A JetPak lifts out whole and seals to the shell with a gasket. How the jets attach inside the pack isn't published, and packs are sold only complete.
Applies to: All series
Adjustable jetsCan you turn each jet up or down?Not published
Service networkCan someone near you fix it?Partly
Dealers do the service, and only they stock the JetPak parts.
Bullfrog sells through authorized dealers and its own factory stores, and the manual sends every warranty issue to them. Manuals are published free and commodity parts are easy to source, which helps an independent tech. The proprietary JetPak and manifold parts are not widely stocked outside the network.
Applies to: All models, North America
American made?Built in Bluffdale, Utah and Herriman, Utah.Yes
The full Bullfrog Spas build-quality report, ranked against every brand →
Also on this model
Warranty
- Shell structure
- 10 years
- Shell surface
- 7 years
- Equipment
- 5 years
- Plumbing
- 5 years
- Cabinet
- 5 years
- Heater
- 5 years
What you get.
STIL. Design-led JetPak spa with an open-concept layout, pitched at modern backyards.
- Massage
- 171 jets on 1 jet pumpModerate massage: 2.4 HP continuous in all (estimated from the peak rating)
What stands out
Similar tubs. Same size, any brand.
More like it:Tubs for 4 to 5Plug-and-play hot tubsHot tub weightHot tub electrical requirements
The detailsAll 82 specs, the energy filing and every source
Every specification
Everything Bullfrog Spas publishes for the STIL5. The dot after a value opens the document it came from.
Size & capacity
Electrical & heat
Build & insulation
Water care
Controls & features
Feature guides:InsulationCoversHeatersFiltersWi-Fi appsAudioLightingWater featuresWhich features are worth paying for
Doesn’t have: salt system.
Energy filing
- California’s limit for its size
- 191 W
- Typical for its size
- 165 W (the middle of 102 tubs this size)
- Water in the test
- 256 gallons
Standby is what the tub draws just holding its temperature, measured to California’s test method ↗. Your bill depends on your weather, your rate and how often you soak.
Where Bullfrog Spas’ documents disagree
Two of its own documents give different answers. Check these against your quote.
Ask the dealer
Bullfrog Spas doesn’t publish the heater size, pump horsepower, filter area or cover thickness for the STIL5. Ask for them in writing.
Sources
- Bullfrog Spas’ page for the STIL5 ↗
- Bullfrog Spas’ warranty ↗
- bullfrogspas.com: document 1 ↗, document 2 ↗, document 3 ↗, document 4 ↗, document 5 ↗, document 6 ↗
- bullfrogfactorystores.com: document 1 ↗
- cdn.spasoftwaresolutions.net: document 1 ↗
- api.yotpo.com: document 1 ↗
What’s a good deal on the STIL5?
We send you the price range, by call, text or email: what a great deal, a good deal and market value look like. Then we introduce you to one Bullfrog Spas dealer near you, who reaches out knowing what you expect to pay.
Get a price on this tub
Free. Your price range, then one dealer near you.
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