A whirlpool bath is a great way to relax after a hard day's work. When it comes to choosing the right one, there are a lot of features to consider.

Base materials

The base - the actual tub - can be made of several different types of materials:

  • Cast iron is the premier tub material, rock-solid with a layer of high-gloss enamel in a wide range of colors. Most cast-iron bases come with a 50-year warranty. Keep in mind that cast iron is obviously extremely heavy, so installing one may require structural upgrades.
  • An acrylic tub can be manufactured in unique shapes and sizes. These models are vacuum-molded from sheets of colored acrylic and reinforced with fiberglass for resistance against cracking and flexing. Acrylic tubs are durable and easy to care for.
  • Composite tubs are constructed of a mixture of polyester resin and fiberglass, making them economical, attractive and easy to maintain. They also weigh 20 percent less, making installation much easier.

The hardware

The water jets are the most important part of a whirlpool - you can option for four or five jets with a standard tub, or up to 19 or 20 for a custom model. If you're investing in a high-end whirlpool, you'll get adjustable or even sequencing jets.

The best type of whirlpool pump is a two horsepower variable-flow model. This type offers the most power with the least energy consumption. Most standard tubs come with a one or two horsepower pump.

Other features

Another good option to consider in your new whirlpool is an integral water heater - this will reheat the water as it flows through the system, keeping you warm and comfortable longer and reducing the strain on your primary water heater.

And for safety's sake, be sure to look for these features as well:

  • 20-minute safety shutdown
  • ADA compliance
  • Slip-resistant finish
  • Adequate ledge space
  • Lumbar back support
  • Built-in grip rails

Installation

In most communities, building codes require whirlpool tubs to be installed by certified professionals because of the risk of working around water and electricity.

If you prefer, you can purchase a whirlpool at your local home center or retail outlet, and hire someone to install it for you.

More from this category

Kohler Test Lab

Finger pressing a shower technology panel

Innovation is just a turn of the faucet away at the Kohler manufacturing plant. Find out how new products can help you save water and money.

learn more

Waste water heat recovery system

Man demonstrating pipe

This new technology for water heaters can help save energy. It works with standard, solar, tankless, electric or gas water heaters.

learn more

Water softeners

Water softener

Soft water improves dishes, showers, and extends the life of your appliances. Find out what you need to know about installing and maintaining a water softener.

learn more

Saving energy with sump pumps

Man pointing at sump pump equipment

Sump pumps use a lot of energy. Find out how to minimize how often yours turns on.

learn more

Tricks for saving water and energy

Person writing on a hot water heater

Saving water and energy is good for the environment and good for your wallet. Everyone in the family can help.

learn more

Water heater installation

Man installing a water heater

We recommend having your water heater professionally installed. Learn what to expect.

learn more

Choosing the best water heater

Water heater expert talking to Megan

There are different types of water heaters you can purchase, including tank, tankless and solar technology.

learn more

Installing a low flow showerhead

Low-flow showerhead being installed

Save up to $250 per year with this one simple swap.

learn more