Principle of Filtration

Water is drawn by the pump from the bottom of the pool through the pool drain (1) and from the surface of the pool through skimmers /collectors/ (2) via the valve (3) into the filter (5), where it is cleaned. It is then pushed back into the pool through the recirculation nozzles (6). The nozzles are located on the opposite side from where the bottom drain and skimmers are installed. The filter itself contains a sand filling, which traps insoluble impurities contained in the water. After a certain period of filtration, the sand becomes clogged and the water can no longer pass through it easily. It is therefore necessary to backwash the sand. Backwashing or rinsing is carried out by feeding water into the filter in the opposite direction to the filtration process.

Technical Parameters

• Tank material: polyester resin reinforced with fiberglass
• Filling quantity: 300 kg
• Tank diameter: 750 mm
• Tank height: 925 mm
• Max. working pressure: 2.5 kg / cm²
• Flow rate: 21 m³ / h
• Valve type: 6-way side
• Filtration speed: 50 m³ / h / m²
• ClearPro filtration technology: No
• Base: Yes
• Weight: 31.811 kg

The complete list of spare parts can be found here: 

Spare parts for the Lisboa 750 mm filter tank, flow rate 21 m3 / h, side valve