Astralpool Monoblock Sand Filter Millennium For Swimming Pools

AstralPool Millennium Monobloc Sand Filter System with Sena Pump

The AstralPool Millennium Monobloc is a complete swimming pool filtration assembly combining a Millennium sand filter, a Sena circulation pump and a compact supporting base. Designed for residential swimming pool filtration, the range offers top-outlet and side-outlet configurations with different filter diameters, pump capacities and filtration rates.

Available in five filter diameters from 380 mm to 660 mm, the Millennium Monobloc range provides nominal filtration rates from 5.5 to 17 m³/h. Depending on the selected configuration and hydraulic installation, the systems are designed for swimming pools with approximate volumes of up to 140 m³.

Key Benefits

• Integrated filtration assembly: Millennium filter and Sena pump mounted together on a supporting base.
• Five filter sizes: Diameters of 380, 430, 480, 560 and 660 mm.
• Two configurations: Top-outlet and side-outlet models to accommodate different installation layouts.
• Mechanical filtration: Compatible with suitable silica sand or glass filtration media.
• Corrosion-resistant construction: One-piece blow-moulded plastic filter body without welded joints.
• Maintenance equipment: Pressure gauge and manual air and water drainage provisions.
• Matched pump assemblies: Sena pumps with power ratings selected according to filter diameter.
• Filtration capacity: Nominal flow rates ranging from 5.5 to 17 m³/h across the range.

How the Millennium Monobloc Works

The Sena circulation pump moves pool water through the Millennium filtration vessel. Suspended particles are retained by the filtration media as water passes through the filter bed. The filtered water then returns to the swimming pool through the circulation system.

Routine maintenance includes checking the filter pressure and performing the appropriate filter cleaning operations using the installed valve configuration. Follow the manufacturer's operating instructions for filtration, backwashing, rinsing and other available valve functions.

Construction and Technical Features

Millennium Filter Vessel

• One-piece blow-moulded plastic construction without welded joints.
• Manual air release and water drainage provisions.
• Pressure gauge for monitoring operating pressure.
• Compatible with suitable sand and glass filtration media.
• Filter diameters from 380 to 660 mm.
• Maximum working pressure determined by the selected filter diameter.

Sena Circulation Pump

• Sena pump supplied as part of the monobloc assembly.
• Pump power ratings from 1/3 CV to 1.25 CV, depending on model.
• Nominal electrical supply: 230 V, single-phase.
• Frequency: 50 Hz.
• Pump and filter capacity matched within the manufacturer's model range.

Connections and Installation

• Nominal hydraulic connections: 1½ inches.
• Top-outlet or side-outlet filter configuration, depending on model.
• Integrated supporting base for the filter and pump assembly.
• Installation must follow the manufacturer's hydraulic and electrical requirements.

Important: The nominal filter flow rate does not independently establish compatibility with an existing pool installation. Pump selection must also consider pipework, hydraulic resistance, required circulation flow and installation conditions.

Available Millennium Monobloc Models

Top Outlet Monoblocs

• 27805 FP46: Ø380 mm, Sena 1/3 CV, 5.5 m³/h, pools up to approximately 40 m³.
• 23342 FP46: Ø430 mm, Sena 1/3 CV, 7 m³/h, pools approximately 40–50 m³.
• 23343 FP46: Ø480 mm, Sena 1/2 CV, 9 m³/h, pools approximately 50–75 m³.
• 23344 FP46: Ø560 mm, Sena 3/4 CV, 12 m³/h, pools approximately 75–100 m³.
• 28299 FP46: Ø660 mm, Sena 1.25 CV, 17 m³/h, pools approximately 140 m³.

Side Outlet Monoblocs

• 27804: Ø380 mm, Sena 1/3 CV, 5.5 m³/h, pools up to approximately 40 m³.
• 23348: Ø430 mm, Sena 1/3 CV, 7 m³/h, pools approximately 40–50 m³.
• 23349: Ø480 mm, Sena 1/2 CV, 9 m³/h, pools approximately 50–75 m³.
• 23350: Ø560 mm, Sena 3/4 CV, 12 m³/h, pools approximately 75–100 m³.
• 28301: Ø660 mm, Sena 1.25 CV, 17 m³/h, pools approximately 140 m³.

The swimming pool volumes above are approximate manufacturer application ranges. The correct model must be selected according to the required circulation flow and the hydraulic characteristics of the installation.

Filtration Media Requirements

The Millennium filtration vessel supports suitable silica sand or glass filtration media. Required quantities depend on filter diameter.

Filtration media is not included unless explicitly specified in the selected product offer. Use the media type and particle size recommended for the installed filter configuration. Do not exceed the manufacturer's prescribed loading quantity.

Maximum Working Pressure

• 380 mm models: 2.5 kg/cm².
• 430 mm models: 2.5 kg/cm².
• 480 mm models: 2.5 kg/cm².
• 560 mm models: 2 kg/cm².
• 660 mm models: 2 kg/cm².

These values represent the maximum working pressure specified for the Millennium filters. Normal operating pressure depends on the installation and must remain within the applicable manufacturer limits.

Choosing Between Top and Side Outlet Models

Top Outlet Configuration

Top-outlet monoblocs position the valve assembly above the filtration vessel. The configuration is suitable for installations designed around vertical access and the corresponding connection layout.

Side Outlet Configuration

Side-outlet monoblocs position the valve connection laterally. This configuration supports installations designed around side-access pipework and the associated equipment layout.

Select the outlet configuration according to the available installation space, existing connections and maintenance accessibility. Confirm the supplied valve assembly and included accessories for the exact product reference before ordering.

Installation and Maintenance

• Position the assembly on a stable, level and adequately supported surface.
• Verify sufficient space for pipe connections and maintenance.
• Connect the pump and filtration system according to the manufacturer's installation instructions.
• Use suitable filtration media in the quantity specified for the selected diameter.
• Check that the hydraulic circuit and valve positions are correct before starting the pump.
• Release trapped air and monitor the pressure gauge as instructed by the manufacturer.
• Perform filter cleaning operations according to the installed valve configuration.
• Follow the manufacturer's drainage and winterization procedures when protecting the system from freezing.

Safety: Never operate the pump against closed valves or change valve positions while the pump is running. Disconnect the electrical supply before maintenance. Electrical installation must comply with applicable safety requirements.

Frequently Asked Questions

Is the Sena pump included?

Yes. Millennium Monobloc assemblies combine the filter and a Sena circulation pump. Pump power varies according to the selected reference.

What is the difference between the 23348 and 23349 models?

Both are side-outlet monoblocs. Model 23348 has a 430 mm filter, a 1/3 CV Sena pump and a nominal flow rate of 7 m³/h. Model 23349 has a 480 mm filter, a 1/2 CV Sena pump and a nominal flow rate of 9 m³/h.

Which model is suitable for a 40 m³ swimming pool?

The manufacturer lists the 380 mm model for pools up to approximately 40 m³ and the 430 mm model for pools approximately 40–50 m³. Final selection depends on the required flow rate, plumbing, installation conditions and system resistance.

Can I use glass filtration media?

Yes. The manufacturer confirms compatibility with glass filtration media. The appropriate load depends on filter diameter, ranging from 28 kg for the 380 mm vessel to 175 kg for the 660 mm vessel.

Is the same maximum pressure applicable to every model?

No. The 380, 430 and 480 mm models have a maximum working pressure of 2.5 kg/cm². The 560 and 660 mm models have a maximum working pressure of 2 kg/cm².

Can I replace an existing pool pump with a Millennium Monobloc?

A replacement installation requires checking the existing circulation system, hydraulic connections, required flow rate, electrical supply and available equipment space. The pool volume alone is not sufficient to confirm compatibility.

Is filtration media included?

The manufacturer's specifications identify the required media quantities but do not include filtration media with commercial offer. 

Support and Compatibility

Choosing a filtration system requires more than matching the pool volume. LordsWorld can assist with selecting the appropriate Millennium Monobloc configuration based on your swimming pool dimensions, existing pump and filter, pipework and circulation requirements.

For technical product selection, supplier availability or delivery arrangements, contact LordsWorld before purchasing when the selected product requires prior confirmation.

Manufacturer Information

Manufacturer: AstralPool, Fluidra.

Product family: Millennium Monobloc filtration systems with Sena pumps.

Available configurations: Top outlet and side outlet.

Technical specifications refer to the manufacturer's published configurations. Confirm the exact selected variant and current supplier documentation before installation.