Pool filtration

Your pool filtration system plays a vital role in maintaining excellent water quality. For this reason, it must be carefully designed and correctly sized to match the volume of water in your swimming pool.

Today, sand filters are the most commonly installed pool filtration systems for traditional in-ground and semi-inground swimming pools. They provide excellent filtration performance while remaining easy to operate and maintain.

Whatever type of filtration system you choose, it should always be properly matched to your pool's size, hydraulic system and operating requirements.

MC Piscine, specialists in luxury swimming pools and premium pool equipment, explains everything you need to know about pool filtration systems and helps you choose and install the most suitable solution for your commercial swimming pool or private swimming pool.

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What Is the Purpose of a Pool Filtration System?

Alongside water treatment products, the pool filtration system is essential for maintaining clean, healthy swimming water.

Working together with your pool water treatment system, filtration continuously removes impurities from the water, ensuring your swimming pool remains clear, hygienic and enjoyable throughout the season. The filtration system includes all the equipment required to circulate water from the pool to the filter and back again.

As the water passes through the filter, dirt, leaves and other impurities are trapped inside the filter tank, leaving the water clean before it is returned to the pool.

Choosing the right pool filtration system makes day-to-day maintenance much easier and helps keep your pool clean with minimal effort. A correctly sized filtration system is one of the most important factors in maintaining crystal-clear water over the long term.

What Makes Up a Pool Filtration System?

A pool circulation system is made up of several components working together. Each piece of equipment plays an essential role in ensuring efficient water circulation and effective filtration.

Every swimming pool filtration system consists of six essential components:

1. Skimmers

Skimmers are built into the structure of the pool during construction or renovation. Their role is to skim the water surface and collect floating debris such as leaves and insects before they sink to the bottom of the pool. The collected debris is stored in removable skimmer baskets, which should be emptied regularly during routine maintenance.

Did You Know?

Infinity pools and mirror pools do not use skimmers. Instead, overflowing water is collected in a perimeter channel before flowing into a balance tank and then through the filtration system, where debris is removed.

2. Main Drain

The main drain is another essential built-in component of the swimming pool. Located at the deepest point of the pool, it draws water from the bottom of the basin and plays a key role in ensuring proper water circulation before the filtration process begins.

3. Pool Pump

The pool pump draws water from the pool and sends it through the filter, where impurities are removed. Once filtered, clean water is returned to the pool through the return inlets, maintaining continuous circulation and excellent water quality.

4. Pool Filter

The pool filter traps dirt, fine particles and other contaminants inside its filter media, producing clean, crystal-clear water. To maintain optimal filtration performance, the filter should be cleaned regularly using the multiport valve.

5. Multiport Valve

The multiport valve controls the different operating modes of the filtration system, including filtration, circulation, backwashing, rinsing, waste and closed positions. It regulates water flow throughout the filtration system and is essential for the proper operation and maintenance of the pool filter.

6. Return Inlets

The return inlets are also built into the pool structure. They return filtered water back into the pool and create water movement that helps distribute clean, treated water evenly throughout the swimming pool.

Sand or Glass Filter: A Versatile and Long-Lasting Filtration Solution

Many pool owners wonder which filter media they should use. The choice of filter media has a direct impact on water quality and the overall performance of the filtration system.

The sand filter is the most widely used filtration system for residential and commercial swimming pools. It consists of a filter tank filled with either filter sand or glass filter media, allowing pool water to be filtered efficiently as it circulates through the system.

Suitable for virtually every type of swimming pool, sand filters are capable of handling large volumes of water. They are therefore an excellent choice for medium-sized and large pools, including commercial pools, hotels and luxury residential properties.

Depending on your needs, you can choose between sand or glass media. Selecting the right filter media is essential to achieve the desired level of filtration, and professional advice is often recommended to ensure the best long-term performance.

Sand or Glass Media: Which Should You Choose?

Both filter sand and glass filter media offer excellent filtration performance.

Although they perform the same function inside the filter tank, their filtration efficiency, lifespan and maintenance requirements differ. Particle size, durability and purchase cost all vary, making it difficult for many pool owners to decide which option is best.

Both solutions are highly effective at removing impurities and maintaining clean, clear swimming pool water.

MC Piscine's Recommendation

Although both media provide excellent filtration, glass filter media generally delivers superior long-term performance. While slightly more expensive than sand, glass offers finer filtration, resists clogging over time and typically requires less frequent backwashing. For these reasons, it is often the preferred choice for customers seeking the highest water quality and reduced maintenance.

Cartridge Filters: Efficient and Easy to Maintain

A cartridge filter consists of a rigid housing containing a replaceable filter cartridge made from high-performance synthetic or plant-based fibres.

Good to Know

This type of filter is generally recommended for small swimming pools (up to approximately 20 m³). It is not designed to handle large water volumes efficiently but is perfectly suited to compact residential pools. Routine maintenance simply involves cleaning the filter cartridge on a regular basis.

The cartridge filter is therefore a highly efficient and cost-effective filtration solution.

Although the cartridge requires periodic replacement to maintain optimum filtration performance, this system remains an excellent option for many residential swimming pools thanks to its simplicity and excellent filtration quality.

Which Pool Filter Is Right for You? Compare the Different Solutions

MC Piscine Helps You Choose the Right Filtration System for Your Swimming Pool

The filtration system recommended by our team depends on several factors, including the pool's water volume, the flow rate of the pool pump and the overall hydraulic design of your swimming pool.

Whether you are building a new pool or upgrading an existing installation, we can help you design and install a filtration system tailored to your needs. We carefully select high-quality equipment suitable for all types of in-ground and semi-inground swimming pools.

We also supply and install a complete range of filter media, including premium filter sand and high-performance glass media, and can replace existing media whenever required. Whatever your filtration needs, the MC Piscine team is here to provide expert advice and long-lasting solutions.

Our specialists can visit your property, assess your existing installation and recommend the most efficient filtration system to improve water quality, optimise energy consumption and simplify day-to-day pool maintenance.

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