AquaFIT Sport

For the inner competitor in you.

Explore The AquaFIT Sport

AquaFIT Play

The perfect mini pool for you and your family.

Explore The AquaFIT Play

AquaFIT Pro

Your underwater fitness powerhouse.

Explore The AquaFIT Pro

AquaFIT Plus

The ultimate hybrid of fitness and relaxation.

Explore The AquaFIT Plus

Fitness and Wellness

Explore Fitness and Wellness


Explore Therapy


Explore Swimming

The AquaFIT Experience

Explore The AquaFIT Experience


Explore Water


Explore Construction


Explore Features

AquaFIT Kits

AquaFIT Kits

How to Exercise

How to Exercise

Planning and Installation

Planning and Installation

Register Your AquaFIT

Register Your AquaFIT

Who We Are

At Dimension One Spas, the difference isn’t just in one thing, it’s in everything we do. From the way we build our spas, to your experience, to the care your spa will give you for years to come, our passion is for you to lead a happier, healthier life.

It’s our innate drive to constantly be better, stronger, and last longer. We know what a hydrotherapy experience can do for you and we just can’t keep it to ourselves.

Company History

Dimension One Spas, founded in 1977, has grown to become one of the world’s leading manufacturers of hot tubs and swim spas.

Dimension One Spas (D1) is the leading manufacturer of award-winning hot tubs and swim spas and home to the world’s first curvilinear spa. D1 Spas is based in Vista, CA and sold through a network of retailers in the United States and worldwide. With over 35 years of experience, the company’s four product lines and patented features offer a higher class of design, performance and value that meet a variety of consumer needs. In 2007, D1 was awarded the Silver Medal Shingo Prize, becoming the world’s first and only hot tub manufacturer to receive the distinguished award. D1’s hot tubs have also achieved the Spasearch Buyer Guide’s highest “Recommended” rating – see more about our awards here.

D1’s hot tubs have also achieved the Spasearch Buyer Guide’s highest “Recommended” rating. View our Awards here.

  • 1977

    Dimension One Company Founded

    Dimension One opens its first retail store in La Mesa, California.

  • 1981

    First Fully Insulated Hot Tub

    D1 Spas is first to manufacture a fully insulated spa for in-ground or above-ground usage.

  • 1983

    Self-Contained Portable Spa

    D1 begins manufacturing a self-contained portable spa that is fully insulated and uses electronic controls.

  • 1987


    Introduces the UltraLounge®, the benchmark standard for hydrotherapy.

  • 1988

    CrystalPure Water Management

    First company in the spa industry to provide a factory installed ozone purification system.

  • 1989

    Volcano Jet

    Inroduces the first vertical jet with 100 GPM for foot, ankle, and calf therapy.

  • 1990

    Diverter Valve

    D1 introduces the patented user-serviceable diverter valve.

  • 1992

    EZ – Lifter®

    Receives a patent for the first fully adjustable cover lift in the industry.

  • 1994

    HydraFlex® Jet

    D1 brings out the patented HydraFlex® Jet, the only jet that adjusts for air-flow, direction and water volume.

  • 1996

    NeckFlex™ Jet Pillow

    D1 Spas is the first and only company to include an adjustable up and down patented head rest.

  • 1996

    UltraPure Water Management

    D1 Introduces the most effective ozone water filtration system in the hot tub industry, UltraPure®.

  • 1997

    FastFlo™ Heater

    D1 introduces a smart heater that enhances performance.

  • 1997

    Scrolling Message center™

    D1 introduces a self-checking diagnostic control center.

  • 1999

    Dynamic Massage Sequencer

    Introduces the revolutionary Dynamic Massage Sequencer which is the world’s only programmable hydrotherapy lounge.

  • 2002

    iWatch, Tactile Therapy, Magnets

    Release of several new systems to enhance user relaxation, iWatch, Magnetic Switches, and Tactile Therapy.

  • 2002

    Curvilinear Spa Design

    Breakthrough curvilinear design is patented and only available from D1 Spas.

  • 2007

    UltraPure PLUS

    An industry first, the only spa water management system to integrate ultraviolet germicidal light technology with an ozone system.

  • 2012

    Terracina Skirting

    Terracina skirting provides the most unique blend of durability and natural beauty found on the market, exclusive to D1.

  • 2005

    Liquid FX Package

    D1 brings out the LFX option package, the most sumptuous mood enhancing experience in the industry. Utilizing interchangeable water fountains, lights and more.

  • 2006


    Releases M-Drive, the world’s most intuitive and ergonomically friendly hot tub controller.

Company Core Values

D1’s core values drive all D1 actions, decisions and plans so that dealers and customers alike can have the best experience possible.


We behave in ways that are morally, ethically, professionally and legally responsible. We take pride in our company and in ourselves, resulting in a positive image and reputation for the Dimension One family.


We focus on future profitability by investing in our people, quality and growth for our success tomorrow. We identify and eliminate waste in all of our operations to maximize value and ensure continued financial success.

Continuous Improvement

We strive to be the industry leader in innovation and quality, constantly improving our products and services to further delight our customers. The diversity, involvement and accountability of our partners are the cornerstones of our success.

Environmental Stewardship

Help protect and sustain the environment by developing eco-friendly products and manufacturing processes.


We create and maintain mutually rewarding relationships, and meet or exceed expectations in every aspect of our operations.


There is no “I” or “they,” there is only “we”—the Global Dimension One Family, where everyone is treated with mutual respect and understanding. We continuously improve our skills, knowledge and operations and benefit mutually from our success.


Dimension One Spas® (D1®), founded in 1977, is one of the world’s leading manufacturers of premium home hot tubs/spas and AquaFIT Systems, commonly known as swim spas.

D1 has innovated countless new features and products that have resulted in over 30 patents. These are the innovations and advancements in science and engineering that have kept D1 an industry leader for over 35 years.

Copyright© 2015 New Dimension One Spas, Inc.