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WP20-20B Top Filter is a mechanical polypropylene fiber cartridge for pipe housings BIG BLUE 20" (also for HHBB-20B stations). It effectively traps sand, silt, rust, and other suspensions, filtering with an accuracy of up to 20 microns. It protects the water installation and subsequent filtration stages (e.g., carbon, softening, de-ironing).
WP20-20B Top Filter 20 micron BIG BLUE 20" cartridge is an efficient filter cartridge for preliminary mechanical water filtration, designed for BIG BLUE 20" inline housings and the HHBB-20B station. Made of polypropylene nonwoven fabric, it effectively traps sand, silt, rust, and other suspended solids, helping protect the water system and subsequent components of the water filtration system. It is a practical water filter supporting everyday water treatment in homes and apartments, especially where protecting fittings and downstream cartridges, such as carbon, softening, or iron removal cartridges, is important.

Cartridges from the WP series are mechanical filters made of polypropylene nonwoven fabric. The WP20-20B model is designed for effective removal of mechanical impurities from water, such as sand, silt, rust, and various types of suspended solids.
Thanks to a filtration accuracy below 20 microns, the cartridge works well as a pre-filtration stage in domestic and utility installations. It helps limit the passage of solid particles into fittings, pipes, and subsequent elements of the treatment system.
The WP20-20B model is designed for 20-inch BIG BLUE inline housings and for the HHBB-20B water treatment station. The BIG BLUE 20" format is often chosen where a larger filtration surface area and effective mechanical filtration at the system inlet are important.
The cartridge can operate as the first protective stage in advanced water filtration systems, also as protection for subsequent components used in processes such as carbon filtration, softening, iron removal, and also as a prefilter before selected solutions in which an osmotic filter or reverse osmosis system is used.
The cartridge structure is made of polypropylene nonwoven fabric formed in such a way that the filtration process takes place throughout the entire structure of the material. In practice, this means effective capture of solid particles present in the water and stable operation under typical operating conditions intended for this model.
This type of mechanical filtration is particularly useful wherever water may contain sediment that causes faster wear of fittings, fouling of equipment, or reduced effectiveness of subsequent cartridges in the system.
Important operating information: the cartridge should not be used for water of unknown origin or for microbiologically contaminated water.
Service life note: the declared operating capacity depends on the level of water contamination. The more mechanical suspended solids are present in the water, the sooner the cartridge may need to be replaced.
The 20 µm mechanical cartridge is a good choice as a pre-filter wherever the goal is to protect the system against typical mechanical sediment. It works well in houses, apartments, and water draw-off points requiring reduced presence of sand, silt, rust, and suspended solids.
As a preliminary element, it helps prepare water for further filtration stages. Thanks to this, it can support the operation of more specialized filtration media and limit their premature wear. This solution is particularly useful in installations where an advanced water filtration system, reverse osmosis filter, or other water treatment devices are used.
* Service life depends on water contamination.
| Parameter | Value |
|---|---|
| Product no. | WP20-20B |
| Filtration accuracy | < 20 micron |
| Length | 20" |
| Diameter | 4½" |
| Service life | max. 14000 L * |
| Operating temperature | 2-42 °C |
The cartridge is designed for 20-inch BIG BLUE inline housings and for the HHBB-20B water treatment station.
The WP20-20B model removes mechanical impurities present in water, such as sand, silt, rust, and other suspended solids.
The filtration accuracy is below 20 microns, which allows effective protection of the water system and subsequent filtration stages against larger mechanical particles.
The cartridge is made of foam, i.e. polypropylene nonwoven fabric, formed so that filtration takes place through the entire structure of the cartridge.
Yes. The cartridge helps protect more expensive carbon, softening, and iron removal cartridges, as well as the water system itself and fittings, against mechanical impurities.
No. The cartridge should not be used for water of unknown origin or for microbiologically contaminated water.
The maximum service life is up to 14000 liters, however the actual operating time depends on the level of water contamination.
The operating temperature range for the WP20-20B model is from 2 to 42 °C.
Yes. This is a typical mechanical cartridge for pre-filtration that can support the operation of subsequent water treatment stages, such as carbon filtration, softening, iron removal, and in some installations also solutions using reverse osmosis.
WP20-20B Top Filter is a mechanical polypropylene fiber cartridge for pipe housings BIG BLUE 20" (also for HHBB-20B stations). It effectively traps sand, silt, rust, and other suspensions, filtering with an accuracy of up to 20 microns. It protects the water installation and subsequent filtration stages (e.g., carbon, softening, de-ironing).