The Aquafilter HHBB20A 20" Big Blue Two-Stage Water Filter System is a high-capacity water filtration solution designed for domestic, commercial and industrial Point of Entry (POE) applications.

Manufactured by Aquafilter, this professional filtration system features two heavy-duty 20" Big Blue filter housings mounted on a robust metal support platform. Its two-stage configuration allows different filtration technologies to be combined, providing an effective and flexible approach to whole-house water treatment.

Designed for high-flow applications, the HHBB20A features 1" BSP brass inlet and outlet connections, integrated pressure gauges and pressure relief valves.

Compatible with a wide range of standard 20" x 4.5" Big Blue filter cartridges, the system can be configured to address different incoming water quality requirements.

Whether you require sediment filtration, chlorine reduction, improved taste and odour or specialist water treatment, the Aquafilter HHBB20A provides a versatile platform for customised water filtration.

Key Features & Benefits

• Two-stage filtration: Two independent 20" Big Blue housings allow different filtration processes to be combined.

• High-capacity filtration: Large 20" x 4.5" cartridges provide substantial filtration capacity for whole-house applications.

• Whole-house water treatment: Designed for Point of Entry installations, treating incoming water before it enters the property's plumbing system.

• High-flow design: Large-diameter Big Blue housings accommodate high-capacity filter cartridges.

• Heavy-duty construction: Durable polypropylene filter housings with brass connection inserts.

• 1" BSP brass connections: Full-flow inlet and outlet connections for straightforward plumbing integration.

• Integrated pressure monitoring: Two pressure gauges allow monitoring of inlet and outlet pressure.

• Pressure relief valves: Help release trapped air and residual pressure during filter cartridge replacement.

• Flexible cartridge compatibility: Accepts a wide range of standard 20" x 4.5" Big Blue filter cartridges.

• Bacteriostatic cartridge centralising rings: Help position filter cartridges correctly within the housings.

• Blue filter housings: Designed to provide microbial protection in installations exposed to sunlight.

• Metal mounting platform: Provides a stable and convenient installation arrangement.

• Factory assembled and leak tested: Supplied ready for installation.

• No electricity required: Operates using the incoming water supply without electrical power.

Two-Stage Water Filtration – Customise Your System

One of the main advantages of the Aquafilter HHBB20A is its flexibility.

The two filter housings can accommodate different types of 20" Big Blue cartridges, allowing the system to be configured according to incoming water quality and specific treatment requirements.

A typical configuration might include:

Stage 1 – Sediment Filtration

A 20" sediment filter cartridge helps reduce suspended particles such as sand, rust, silt and other particulate matter.

This initial filtration stage helps protect downstream equipment and improve the quality of incoming water.

Stage 2 – Activated Carbon Filtration

An activated carbon cartridge helps reduce chlorine, unpleasant tastes and odours, improving the aesthetic quality of the water supply.

Carbon filtration can also help reduce certain organic compounds, depending on the cartridge technology selected.

Alternative Specialist Cartridge Combinations

The two housings can also be configured with specialist cartridges for specific water treatment requirements, including:

• Iron reduction.

• Water softening and scale reduction.

• Additional sediment filtration.

• Specialist contaminant reduction.

The appropriate cartridge combination should be selected according to a water analysis and the intended treatment objectives.

Integrated Pressure Gauges & Easy Maintenance

The Aquafilter HHBB20A incorporates two pressure gauges positioned at the inlet and outlet of the filtration assembly.

These gauges allow users to monitor pressure before and after the filter system.

An increasing pressure difference across the filtration system can indicate that cartridges are becoming loaded with contaminants and may require replacement.

The integrated pressure relief valves allow trapped air and residual pressure to be released during servicing, helping simplify routine cartridge changes.

The system is supplied with a dedicated filter housing wrench for easier maintenance.

High-Capacity 20" Big Blue Filter Cartridges

The HHBB20A uses standard 20" x 4.5" Big Blue filter cartridges.

Compared with smaller standard-diameter filter cartridges, Big Blue cartridges offer a larger filtration surface area and greater media capacity, making them particularly suitable for whole-house and higher-demand water filtration installations.

The larger cartridge format also provides flexibility when selecting replacement filters for different water treatment requirements.

Suitable Applications

The Aquafilter HHBB20A is suitable for a variety of cold-water filtration applications, including:

• Domestic whole-house water filtration.

• Residential Point of Entry (POE) installations.

• Commercial buildings and premises.

• Industrial water treatment systems.

• Agricultural water filtration applications.

• Borehole and well-water pre-filtration.

• Pre-filtration for reverse osmosis systems.

• Sediment and chlorine reduction installations.

Its two-stage configuration makes it particularly useful where two complementary filtration processes are required within one compact installation.

Technical Specifications

Specification	Details
Manufacturer	Aquafilter
Model	HHBB20A
Product type	Two-stage Big Blue filtration system
Number of filter housings	2
Cartridge size	20" x 4.5" Big Blue
Inlet connection	1" BSP
Outlet connection	1" BSP
Housing material	Polypropylene (PP)
Housing head material	Polypropylene (PP)
Connection inserts	Brass
Pressure relief valves	Integrated
Pressure gauges	2
O-ring material	NBR
Operating pressure	Maximum 6 bar (90 psi)
Minimum water temperature	2°C
Maximum water temperature	45°C
System dimensions (H x W x L)	720 x 380 x 220 mm
Cartridge dimensions	20" x 4.5"
Country of manufacture	EU

What Is Included?

The Aquafilter HHBB20A filtration system includes:

• 2 x 20" Big Blue filter housings.

• 1 x metal mounting platform.

• 2 x pressure gauges with brass extensions.

• Brass connection adapters.

• 2 x bacteriostatic filter cartridge centralising rings.

• Housing O-rings.

• 1 x filter housing wrench.

• Integrated pressure relief valves.

• Installation instructions.

Please note: Filter cartridges are not included unless specifically stated in the product listing. Two compatible 20" x 4.5" Big Blue cartridges should be purchased separately and selected according to your water treatment requirements.

Why Choose the Aquafilter HHBB20A?

The Aquafilter HHBB20A combines high-capacity Big Blue filtration with a practical two-stage configuration suitable for a wide range of water treatment applications.

Its larger 20" cartridge format provides substantial filtration capacity, while the two independent housings allow sediment, carbon and specialist filtration technologies to be combined.

Integrated pressure gauges make monitoring easier, while brass connections, pressure relief valves and a robust mounting platform provide a professional installation solution.

Whether you are upgrading domestic water filtration or specifying equipment for a commercial installation, the HHBB20A offers a flexible and reliable foundation for whole-house water treatment.

Available from GroAqua, your specialist supplier of professional water filtration and water treatment equipment.