Ideal for wellness seekers and active households wanting a versatile, all year-round pool and spa experience at home.

The MB4 features MAAX Force™ swim jets that provide a strong, consistent current, perfect for low-impact exercise, swimming, and water-based resistance training. Its built-in therapy seating and massaging jets offer rejuvenating hydrotherapy after every workout. Despite its compact size, the MB4 boasts premium features like LED lighting, triple layer insulation, and user-friendly controls. With energy efficiency and comfort built in, the American Whirlpool MB4 is the ideal solution for home fitness and wellness.

As well as being a fantastic spa for fitness, the MB4 is also perfectly suited to being a large spa for socialising. It has three dedicated hot tub massage seats grouped together at one end, each with unique jet arrangements to give a range of hydrotherapy benefits. Six additional seats are arranged in a bench configuration with three on each side, adding to the spas capacity. Each of these side seats has a dedicated massage jet, each set at a different height (high, mid and low) so everyone can benefit from hydrotherapy in a way that suits them.

The MB4 is the more powerful variant of the RB4. With an extra 3hp pump (3 in total), MAXX Force™ swim jets and an anti-turbulence water control system giving a smoother, more stable body of water to swim in.

A swim spa tether anchor point sits discretely along the top. Slot your tether system in for the ultimate swim workout.

The MB4 shell is stylish and durable. Made from continuous cast acrylic, this premium thickness shell is hard and non-porous. This allows it to resist stains, fading, scratches and chemical abuse. The the look of pearl or metalescence, the extremely rugged and durable finish offers beauty and peace of mind.

American Whirlpool swim spas are built to the same quality standards as their appliance grade hot tubs. Every model features a steel frame, Northern Exposure® insulation and ABS bottom pan.The locking insulated cover means your MB4 is warm and ready to use any time of the year.

Looking for more options?

If you're looking for a swim spa for a social space rather than a true exercise area, take a look at the American Whirlpool RB4. The RB4 shares the same layout, shape and jet arrangements, keeping the hydrotherapy seats and side benches, but runs on a dual pump system (compared to the 3 pump system in this MB4) and has a set of recreational exercise jets for gentle workouts compared to the powerful MAAX Force jets on this MB4.

If you love the size and shape of this, but would like more space to exercise, the American Whirlpool ML4 has all the same great features and powerful swim jets paired with a wider exercise lane (without the side seating benches).

Key Features