Building an Overflow Pool

Do you dream of a pool where water, terrace and garden visually blend into one another? With an overflow pool, you choose a sleek look, a high waterline and a technically refined system. Leisure Pools Benelux is happy to guide you through the design and installation of a solution that is right down to the smallest detail.

What makes an overflow pool special?

In an overflow pool, the water sits exactly level with the edge. As a result, it flows over the coping or edge finish into an overflow gutter. This creates the well-known mirror effect: the water surface appears to become one with its surroundings. Especially in a modern garden, this creates a calm, luxurious look that is often associated with luxury pools.

Besides the visual aspect, the swimming comfort is also different from that of a classic skimmer pool. The waterline sits higher, making the pool look fuller and feel more pleasant while swimming. Debris floating on the water surface is also removed more quickly. That helps keep the pool clear and tidy.

Full perimeter overflow or overflow on one side

An overflow pool can overflow on all sides or on one side. A full perimeter overflow creates the strongest mirror effect and blends seamlessly into the terrace and garden. A version with overflow on one side is often chosen when the view deserves extra emphasis, for example in an open garden or where there is a difference in height. This variant is also often linked to the infinity effect.

How does an overflow pool system work?

An overflow pool looks minimalist, but technically it requires a precise build. The system consists of several parts that must be perfectly matched to one another.

From overflow edge to return flow

Overflow gutter

As soon as the water level reaches the edge, the water runs into the overflow gutter. This gutter not only collects the water that continuously flows over the edge, but also the extra volume created when swimmers enter the pool.

Balance tank

From the gutter, the water flows to a balance tank. This tank is essential for keeping the water level stable. Water displacement caused by a pool cover, evaporation or intensive use also has to be absorbed. A correctly sized balance tank prevents fluctuations in the level and supports calm, consistent operation.

Filtration and return

The water then passes through filtration and water treatment, after which it is sent back into the pool through the inlets. Thanks to this continuous circulation, surface debris is removed more quickly and a visible dirt line is less likely to form on the wall. That is exactly why an overflow pool is chosen not only for its appearance, but also for its clean water look.

The benefits and points to consider during construction

Those who choose to have an overflow pool built usually opt for a combination of design and ease of use. The main benefits are:

• a sleek, exclusive look with a high waterline
• a seamless transition between pool, terrace and garden
• quick removal of floating debris from the surface
• a less visible waterline on the pool wall
• a calm and comfortable swimming experience

What to keep in mind

Installation is technically more complex than with a skimmer pool. The overflow edge must be perfectly level, the gutter must drain correctly and the balance tank must be matched exactly to the volume and intended use. The edge finish, waterproofing and connection of the technical systems also require experience. That is why an overflow pool is usually more expensive to build and less suitable for anyone willing to compromise on finishing or technology.

Build an overflow pool yourself or have it installed?

Searches such as DIY overflow pool or build an overflow pool yourself are common, but in practice this is a project with very little margin for error. A small deviation in level, slope or waterproofing immediately affects the overflow effect and the reliability of the system. The sizing of the balance tank, the technical installation and the finishing around the edge also require specialist knowledge.

Anyone who truly wants the sleek mirror effect an overflow pool is known for therefore usually chooses professional installation. A clear step-by-step plan for your pool project helps align the design, technology and finishing from the very start.

Location, design and permits

When building an overflow pool, it is not just about the pool itself. Its position in the garden, sightlines from the house and terrace, sun exposure and how it connects to the surroundings are also important. The effect works best when the edge finish, the terrace and the water level are designed as one whole.

There are also rules regarding dimensions and placement. Whether you need a permit application for a pool depends on your plot, the size of the project and local regulations. So always check the current rules in your municipality before the work starts.