Zero Edge Swimming Pool Design Considerations

Designing a zero-edge swimming pool is an exciting challenge that yields stunning results. Picture it: water flowing seamlessly over the edges, perfectly level with the adjacent surface, creating a mesmerising visual effect. 

I’ve been working on a build with a client and realised I haven’t covered zero edge pools so far. So here are a few key things to consider to ensure your build goes well!

Let’s break it down.

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Understand the Difference

Before we get into the specifics of a zero-edge pool, let’s talk about how traditional pools are usually set up. In most pools, the water level sits below the edge of the coping, with a visible gap or distance between the water level and the top of the pool – just as you can see below. You’ll usually see a skimmer in place too, which helps manage displaced water when people enter the pool. 

Now, a zero-edge pool is completely different. The water level is flush with the surrounding surface, and when someone enters the pool, the displaced water flows over the edge into a trough or drain. This water is collected in a balance tank, and once the person exits, it’s pumped back in to maintain that perfect, flat water surface.

Plan the Balance Tank Size

The balance tank is one of the most important parts of a zero-edge pool. Its size needs to be carefully calculated based on the number of people who will use the pool at any given time. 

On average, an adult displaces about 70 litres of water or 15 gallons. So if you’re planning for 10 people in the pool, you’ll need a balance tank that can hold at least 700 litres or 150 gallons. Always add a little extra space to keep the system running smoothly.

Design the Troughs and Drainage

The troughs surrounding the pool collect the overflowing water and send it to the balance tank. You can either taper the trough itself to use gravity for this or install properly sloped piping. 

Whether it’s a simple gravity-fed system or a more complex setup with sunken drains, the goal is to direct the water back to the balance tank efficiently. You can check out my video on pool plumbing here.

Customise Your Grates

When it comes to the grates that cover the drainage system, you don’t have to settle for pre-made options. You can customise the finish to match the look you want. In fact, my current build is using a stone finish, with the grates hidden beneath for a clean, polished aesthetic.

Easy Maintenance Access

Since there’s no skimmer like in a traditional pool, the edge of your zero-edge pool acts as the skimmer. This means you’ll need easy access to the channels and balance tank for maintenance. Debris can collect there, so it’s crucial to have access in place for regular cleaning and upkeep.

Control the Flow

Do you want the option to turn your zero-edge effect on and off? For some, the constant sound of running water can be calming, but for others, it might become annoying at night for example. 

By adding a simple manifold to your pump system, you can control the suction from the balance tank. That way, you can switch off the overflow effect and keep the water circulating within the pool without it spilling over the edge.

Final Thoughts

The beauty of a zero-edge pool lies in its seamless integration with the surroundings, but it does come with extra planning, especially around the balance tank, troughs, and drainage system. 

The rest—pumps, heating, and general mechanics—functions much like a regular pool. With decent planning and some attention to detail, you’ll create a stunning zero-edge pool.

Can I Help You?

If I can help you in any way I would love to hear from you. You can get in touch using the form below.

Thanks - Andi

 

Hi, Andi here. I own Buildahottub.com and also write all of the articles and info pages on the site. Some years back now, I built my own hot tub but struggled to find the information I needed. So, once my tub was complete, I started this website to help others in their own pursuit of hot tub and plunge pools DIY building information.

Today, I've helped over 1000 DIY customers just like you all over the world build hot tubs and pools. Have a good look around the site, there are lots of resources here. Please do get in touch if I can help you. - Cheers, Andi