Rectangular rigid cold plunge tub with shorter length, wider width, and external chiller unit
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Colderatti

Basin 4 Pro

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The Basin 4 Pro by Colderatti is a four-person stainless steel cold and hot plunge tub built for both residential and commercial wellness spaces, featuring a 2 HP chiller, ozone purification, and full smartphone control.

Tub structure
Rigid
Chiller included
Yes
Hot tub mode
Yes

Description

The Basin 4 Pro is a four-person cold and hot immersion tub constructed entirely from 316L stainless steel, a grade selected for its corrosion resistance and durability in aquatic environments.

Dual-zone water circulation combines a surface skimmer with floor suction to maintain full water column cleanliness, supported by ozone sanitation and a 20-micron NSF-certified filtration system—no chemical additives required. An optional automated pH/ORP controller is available for facilities requiring hands-free water chemistry management.

The chiller can be positioned up to 40 feet (~12 meters) from the basin, which allows it to be moved to a utility space to reduce heat and noise in the bathing are.

The system operates as a self-contained closed-loop unit requiring no dedicated plumbing, though optional supply and drain connections are available at a rear hydraulic strip. Temperature is adjustable via an onboard control panel or remotely through a smartphone. UL-certified components and an NSF-certified filter support regulatory compliance in both residential and commercial settings.

Details & features

Features

Chiller included
Cover lid included
Included Cover lid is insulated
Hot tub mode
Suitable for outdoor use

Temperature

Minimum set temperature (°F)
32 °F
Minimum set temperature (°C)
0 °C
Maximum heating temperature (°F)
104 °F
Maximum heating temperature (°C)
40 °C

Dimensions & weight

Dry weight (lbs)
520 lbs
Dry weight (kg)
236 kg
External chiller weight (kg)
59 kg
External chiller weight (lbs)
130 lbs
Capacity (liters)
1249 L
Capacity (gallons)
330 gal

Power & performance

Power (hp)
2 hp
Supports 220-240V / 50Hz

Details filtering

Main filter included
Main filter micron rating
20 microns

Details sanitation

Ozone (O₃) sanitation

Users

Person capacity (stated by manufacturer)
4 people

General

Plunging orientation
Horizontal
Tub structure type
Rigid
Chiller location
External
Maximum distance between tub and chiller possible (meters)
12.2 m
Maximum distance between tub and chiller possible (feet)
40'
Chiller ready (has ports)
Chilling type
Electric chiller
Commercial use approved
Tub basin main material
Stainless steel
Tub basin steel grade
316 (marine-grade)

Data sources

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Frequently asked questions

Yes — the Basin 4 Pro includes a hot tub mode, allowing you to switch from cold immersion to warm water soaking heating water up to 104 °F (40 °C). This makes it a dual-purpose unit suitable for both cold therapy and relaxation or contrast therapy protocols.

Yes — the Basin 4 Pro is a complete system that includes a built-in chiller. No separate cooling unit is required; you can start cold therapy as soon as it is set up and filled.

The Basin 4 Pro is a horizontal cold plunge designed for seated or reclined immersion, similar in form to a bathtub. This is the most common orientation for home cold therapy setups.

The tub basin of the Basin 4 Pro is made from stainless steel.

Stainless steel offers excellent hygiene, durability, and resistance to corrosion, making it a popular choice for premium cold plunge tubs.