Removable pool filtration

A 15,000-liter pool needs a system with an actual flow rate of 3.5 to 4 m³/h to recirculate the entire volume in under four hours.

A well-balanced technical option is to install an all-in-one unit such as the Star 300 Sand Filter with Pump, which combines a single base, pressure gauge, and valve for easy backwashing.

This sizing prevents premature wear on the electric motor and compensates for pressure loss caused by the 38 mm corrugated hose runs commonly used in these elevated installations.

The main difference lies in the filter media, dirt-holding capacity, and long-term maintenance costs.

• Filtration: Sand or glass filters retain particles as small as 20 microns, while conventional cartridges tend to clog quickly with fine dust.
• Maintenance: The sand system can be cleaned by backwashing with the multiport valve, avoiding the need to replace paper cartridges every two weeks.
• Hydraulic performance: Sand filter units withstand higher continuous pressures and allow manual suction-side pool vacuums to be connected without restricting flow.

For durable filtration in above-ground pools, silica sand or glass media greatly reduce the need for chemical flocculants.

Yes, you can replace only the motor, provided the new model matches the existing filter diameter and can handle the rated flow without excessive pressure.

A straightforward way to upgrade the pump in a tubular-frame or sheet-metal pool is to install the 4-5 m³ Above-Ground Pool Pump, specifically designed for standard 32 mm and 38 mm flexible hose connections.

Make sure the connections are secured with stainless steel clamps to prevent air from entering the suction circuit, ensuring the transparent-lid pre-filter primes quickly.

The connection is made using reducer adapters specifically designed for 32 mm hoses or by replacing the wall fittings with wide-bore fittings.

• Insert 38-to-32 mm threaded adapters into the filtration unit's inlets and outlets.
• Secure the flexible hose sections to the barbed fittings with tightly fastened metal clamps.
• Install an assembly such as the Skimmer + AR100 inlet nozzle if your steel wall supports standard cutouts, to maximize flow without overloading the motor.

Keeping the connections watertight prevents the pump from drawing in air and running dry during the scheduled recirculation cycle.

A 450 mm filter is the right technical choice for a 20 m³ volume because it provides a larger filter surface and lower hydraulic pressure loss.

While a 300 mm tank operates at the limit of its capacity with 20,000 liters, a 450 mm tank can retain more dirt before requiring a backwash, reducing treated water consumption.

Also, because it has a more powerful pump, measured in horsepower, the system generates enough suction to run automatic or manual pool floor cleaners without loss of suction at the nozzle.

The recommended operating time is 6 to 8 hours a day, divided into two or three cycles during the sunniest hours.

The exact calculation is obtained by dividing the cubic meters of water by the nominal hourly flow rate of the installed filtration unit. For example, in an 18 m³ pool with a 4.5 m³/h unit, each complete recirculation requires exactly 4 hours of continuous operation.

Regularly check the pressure gauge on the selector valve and backwash when the needle rises 0.2 or 0.3 bar above the initial resting value.

The filtration unit must sit on a rigid, sturdy, completely level base to prevent damaging vibrations in the motor shaft.

• Place it on a flat concrete slab or heavy-duty outdoor pavers to isolate the base from direct ground moisture.
• Keep the filtration unit at least 3.5 meters from the pool to comply with outdoor electrical safety regulations.
• Protect the motor and electrical connections with a ventilated cover that blocks direct sunlight and heavy rain.

Ensuring physical stability extends the pump bearings' service life and keeps the metal clamps in place without structural fatigue.