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WP20-5B Top Filter is a mechanical filter cartridge made of polypropylene non-woven fabric for BIG BLUE 20" housings and HHBB-20B stations. It effectively removes sand, silt, rust, and other suspensions from water. Filtration with an accuracy of 5 microns helps protect the water system and subsequent cartridges (e.g., carbon, softening, de-ironing).
WP20-5B Top Filter 5 micron BIG BLUE 20" cartridge is a mechanical filter cartridge for BIG BLUE 20" inline housings and HHBB-20B stations, designed for effective removal of sand, silt, rust, and other suspended solids from water. Thanks to 5-micron filtration accuracy, it supports everyday water treatment, protects the water system, fittings, and subsequent filtration system components such as carbon, softening, or iron removal cartridges. It is a practical water filter used as a mechanical stage in a household water filtration system.

Cartridges from the WP series are made of polypropylene nonwoven fabric and are used to remove mechanical impurities present in water. The WP20-5B model is designed for use in BIG BLUE 20" inline housings and HHBB-20B water treatment stations.
In practice, this means effective retention of contaminants such as sand, silt, rust, and other suspended solids that may reduce water quality and accelerate system wear. This type of pre-filtration is important both in simple household setups and in more advanced water treatment solutions, where the mechanical cartridge protects subsequent filtration stages.
5-micron filtration accuracy effectively helps reduce the amount of fine mechanical impurities entering the rest of the system. This is especially important when additional filtration media or devices requiring pre-cleaned water are used in the system.
Such a cartridge can serve as the first protective stage before further water treatment, and in many installations it is used ahead of specialist cartridges. It also works well as protection for components such as valves, faucets, fittings, and other parts exposed to contact with suspended solids.
The WP20-5B model is made of polypropylene nonwoven fabric. The properly formed material structure enables filtration throughout the entire cartridge volume, which supports effective capture of mechanical impurities from flowing water.
This solution is widely used as a mechanical pre-filtration stage in water treatment systems. The cartridge can work with installations where a carbon filter, softening media, iron removal media, or a more advanced domestic water treatment system operates in later stages.
The cartridge should not be used for water of unknown origin or for microbiologically contaminated water.
The WP20-5B cartridge is intended for:
It is a practical choice wherever a durable and effective mechanical stage is needed. Depending on the installation configuration, such a cartridge can be used as part of a larger filtration setup. In advanced water treatment solutions, including, for example, a water filter for further purification stages, mechanical filtration remains one of the basic protective elements.
The cartridge service life is up to 14,000 liters, although the actual operating life depends on the degree of water contamination. The greater the amount of mechanical suspended solids, the faster the filter material wears out.
To maintain filtration effectiveness and properly protect the installation, it is advisable to regularly check the condition of the cartridge and replace it according to operating conditions. This applies especially to systems with water containing elevated levels of sand, silt, or rust.
* Service life depends on the degree of water contamination.
| Parameter | Value |
|---|---|
| Product No. | WP20-1B |
| Filtration accuracy | < 5 micron |
| Length | 20" |
| Diameter | 4½" |
| Service life | max. 14000 L* |
| Operating temperature | 2-42 °C |
The cartridge is intended for BIG BLUE 20" inline housings and HHBB-20B water treatment stations.
The cartridge removes mechanical impurities such as sand, silt, rust, and other suspended solids present in water.
It means that the cartridge retains very fine mechanical impurities, which helps protect the water system and subsequent filtration stages.
The product is made of polypropylene nonwoven fabric in a form that enables filtration throughout the entire cartridge structure.
Yes. It protects carbon, softening, and iron removal cartridges, as well as the water system itself and fittings.
The maximum service life is 14,000 liters, but the actual operating period depends on the degree of water contamination.
The operating temperature range is from 2 to 42 °C.
No. The cartridge should not be used for water of unknown origin or for microbiologically contaminated water.
Yes, the 5-micron mechanical cartridge works very well as a pre-filtration stage that reduces the amount of suspended solids and helps protect further components of the water filtration system.
WP20-5B Top Filter is a mechanical filter cartridge made of polypropylene non-woven fabric for BIG BLUE 20" housings and HHBB-20B stations. It effectively removes sand, silt, rust, and other suspensions from water. Filtration with an accuracy of 5 microns helps protect the water system and subsequent cartridges (e.g., carbon, softening, de-ironing).