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In-Ground Spa Pool

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New Zealand’s most  established spa brand | HotSpring Spas
New Zealand’s most established spa brand
Only brand backed by independent laboratory testing | HotSpring Spas
Only brand backed by independent laboratory testing
Peace of mind guaranteed | HotSpring Spas
Peace of mind guaranteed

The Lowest Running Costs, Independently Tested and Proven

The cost of running a spa pool can be significant… unless you choose Hot Spring. We offer New Zealand’s most energy efficient spa pools, with running costs as little as $1 a day. This is a luxurious soak that won’t cost the earth.

How can such luxury come so cheap? Our insulation is carefully designed for maximum heat retention. Our covers are fully insulated and precisely engineered to form a perfect seal around the lip of your spa.

Then there’s our suite of technological innovations, from heat induction jets that recycle the warmth generated by the internal machinery, to our SilentFlo 5000 circulation system that keeps your water moving while using the same amount of power as a 40-watt light bulb.


Try our energy calculator now ›

What should I look for when buying an in-ground spa pool?

While Hot Spring spa pools and Endless Pools swim spas are predominantly installed above-ground, they can also be placed either partially or completely in-ground. This is usually a choice made for aesthetic reasons, as an in-ground spa pool can form a more organic addition to your backyard than an above-ground spa. When shopping for in-ground spa, consider:

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In-ground spa pools require excavation, and you’ll probably place limits on the size of the hole, which will determine the maximum size of your spa.

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This need for excavation will also determine where you can place your in-ground spa pool in your backyard.

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Are you choosing an in-ground spa pool for aesthetics, accessibility, or something else? Choose a spa that aligns with your needs and wants.

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At Hot Spring we have proven the quality of our spas over decades – just ask our thousands of happy customers.

Take the guesswork out of buying a spa pool. Download your FREE copy of our Spa Pool Buyer's Guide for step-by-step advice through the buying process.

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What is an in-ground spa pool?

An in-ground spa pool is any spa that is built into the ground. These spa pools come in two main forms: custom constructions that are built in situ and made out of concrete, and prefabricated models that are lowered into place.

While Hot Spring spa pools and Endless Pools swim spas are predominantly installed above-ground, they can also be placed either partially or completely in-ground. This is usually a choice made for aesthetic reasons, as an in-ground spa pool can form a more organic addition to your backyard than an above-ground spa.

Why choose Hot Spring as your in-ground spa pool of choice? It ensures you gain access to the unparalleled massage, worry-free water care, energy-efficiency and unmatched customer care that makes us New Zealand’s most trusted spa pool brand!

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Benefits of in-ground spa pool

There are a couple of main reasons why a homeowner might choose to install an in-ground spa pool:


Some people prefer the look of a spa pool that sits flush with the ground. And an in-ground spa pool is an undeniably beautiful thing, the way it subtly and organically forms part of your backyard landscape. This beauty is only enhanced when you choose a Hot Spring, with designs inspired by the traditional in-ground Jacuzzi look, but with a dash of European minimalism thrown in.


With the lip of the spa sitting at ground level, even a large in-ground hot tub is easy to get into. Children, the elderly and those with limited mobility will have no issue in accessing the healing, relaxing waters. The addition of a handrail can also help soakers get in and out.

What size is an in-ground spa pool?

Outdoor in-ground spa pools can be almost any size you like, though you will need to work within the limitations of your backyard.

In terms of the Hot Spring range, you have a choice of everything from a small in-ground spa built for two (such as the 2m² Freeflow Spas Mini), to a sprawling certified party hub (such as the 6.5m², seven-seater Limelight Prism). For those also looking for fitness, you can choose from a range of Endless Pools swim spas with footprints ranging from 8.3m² to 13.8m².

With 38 different in-ground swim spa and in-ground spa pool models in our range, there’s a size, shape, feature list and soaking experience to suit every want and need.

What are hot tub shells made from?

Hot tub shells have two main functions: to keep the water in and to keep the water warm. Shells come in a variety of materials, each with its own strengths and weaknesses:


Used in most swimming pools, vinyl’s cost-effectiveness makes it a cheaper choice for hot tubs too. It doesn’t retain heat well, nor is it particularly durable.

Rotomoulded plastic

This process sees plastic powder heated and spun in a mould. The result is lightweight, cost-effective and far more durable than vinyl.


The Rolls-Royce of hot tub plastics. Although you pay more for acrylic, you’ll enjoy a spa that is both beautiful and durable. However, it is important to note that not all acrylic hot tubs are created equal.


There’s no arguing that wood looks great, but you’ll pay for the looks with endless maintenance, both on the inside and the outside of the tub. 

Key features of an in-ground spa pool

Whether in-ground, above-ground or built into a deck, the best spa pools share a few things in common. Here are a few key features that Hot Spring in-ground spa pools bring to the table:

  • Unparalleled massage: All Hot Spring spa pools feature generous arrays of precisely engineered jets. With each seat offering a slightly different experience, you’re sure to find the ultimate hydromassage somewhere in your new tub.
  • Worry-free water care: A spa pool’s water is its most important feature. Hot Spring spa pools feature water care technologies that reduce the work, while keeping your water clean, clear, soft and fresh for longer – in the case of our FreshWater Salt System, for up to a year!
  • NZ’s most efficient spa pools: At Hot Spring, we have had our spa pools independently lab tested against our major competitors. The results were clear: we offer New Zealand’s most efficient machines, with running costs as low as $1 per day! The secret is in our thicker, denser insulation, which keeps more heat in.
  • Unmatched customer care: Whether you have an issue or simply need some advice, our network of local dealers will always be there to help. With Hot Spring stores spread up and down the country, a friendly face and a helping hand will usually be found a short drive away!



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Installing an in-ground spa pool

The choice to install an in-ground pool shouldn’t be taken lightly, as it demands a number of steps that an above-ground installation doesn’t, including building permission, excavation, landscaping, drainage, and in most cases the installation of safety fencing. You will also need to carefully plan how you will power your in-ground pool.

Drainage is another key consideration. An above-ground pool will usually be able to be drained easily with gravity, but an in-ground pool will need to be drained with a powered pump. By choosing a Hot Spring fitted with high-end water care like the FreshWater Salt System, you can significantly reduce your need to drain and refill your spa pool, as this system can extend the life of your water from a few months to up to a year.

Our local dealers can also take the hassle out of spa installation and delivery with a free on-site inspection and measurement.

In-ground spa pool maintenance

Custom-built concrete in-ground spa pools can be difficult to maintain, machinery can be difficult to access and replacement parts can be hard to come by. But by choosing a Hot Spring model for your in-ground spa pool, you get a machine that is easy to maintain and repair, and may not need as much upkeep in the first place.

Hot Spring spa pools are fitted with high-end technologies designed to replace work with play, from water care innovations like easy-change cartridges and easy clean filters, to salt and ozone systems that keep water fresher for longer, while requiring less chemicals and work.

Add in the beauty, the reliability, the luxury and the innovation of Hot Spring machines, and you have the perfect backyard spa pool, no matter where or how you choose to install it.

Are in-ground spa pool high maintenance?

When you choose a Hot Spring spa pool, your in-ground spa can be far from high maintenance, thanks to a suite of clever technology.

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Water care

Premium Hot Spring machines require just five minutes of water care work a month.

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Draining and refilling

Hot Spring spa pools can be drained as little as once a year when fitted with the FreshWater Salt System.

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Servicing and repairs

Hot Spring spas are simple to service and repair, and we guarantee the supply of spare parts for 20 years.

Are in-ground spa pools good for your health?

On top of enhanced accessibility, in-ground spa pools can offer a range of scientifically proven health and wellness benefits:

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Warm water immersion causes your heart rate to increase and blood vessels to widen, sending more life-giving blood around your body.

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This enhanced circulation can reduce muscle inflammation and offer post-workout relief.

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Spa pools offer effective hydrotherapy, as the buoyancy of the water helps to relieve chronic pain and encourage movement.

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Mental Well-being

A soak in a spa pool is the perfect way to end a busy, stressful day, forming an oasis where you can release all that tension.

Building stronger family connections with a Hot Spring Spa

Quality - the reason behind choosing a Hot Spring spa

"The kids often invite their friends over and often, I've seen as many as 10 kids in the spa. They love it - they’ll stay in all day!" Read more

Erin Santoro

When a very active family of six want to unwind

"We’re a very active family but our Limelight Pulse spa pool is just perfect for when we want to relax, unwind and enjoy family time."  Read more

Carmen Goodyer

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