Here you will find some answers to possible questions you may have. Click on the question to see its answer.

Poltank’s manufacturing capabilities mean that our products can be manufactured according to different standards such as EN-13121 (equivalent to BS4994), ASME X, NSF and EN-16713. All our processes are defined and supervised under the ISO 9001 standard for quality management systems, ISO 14001 for environmental management systems and EMAS standards.

Poltank manufactures its industrial products in blue (RAL 5015), although other colors such as gray (RAL 7001) and white (RAL9001) are also available.

For commercial filters, the standard colors for laminates are red, ivory, blue (RAL 5015), water blue (RAl 5021) and green (RAL 5018 and RAL 6027). Blue (RAL 5015), green (RAL 6027), yellow (RAL 1018), gray (RAL 7001) and black are also used for wound commercial filters.

Although these are the standard manufacturing colors, other colors are available on request. In this case, please contact the technical or commercial department ( to discuss availability.

The main advantage is the stability that the circular base provides, helping to stabilize the filter in high winds and areas with seismic risk. That is why Poltank manufactures all its products with this type of base.

The most common spare parts are nozzles, collector tubes and gaskets. To order spare parts, you simply have to know the serial number of the filter located on the filter identification label and contact the sales department (

Poltank’s product range starts at 350 mm diameter filters, targeted for residential applications, and goes up to 3500 mm diameters for large filters for the desalination industry.

FRP filters are optimal for any salinity level, have a longer life cycle than steel filters and require minimum maintenance. Which is why Poltank only manufactures pressure filters in fiberglass reinforced polyester (FRP).

Poltank does not supply the filter media. The replacement of the filter media depends on factors including water quality, application, and wear and tear. For more information on recommended replacement schedules, please consult your filter media supplier.

To find out how to change the filter media, please request the instruction and maintenance manual from the sales department ( or download it here.

The difference between a laminated filter and a wound filter is the manufacturing process.

Laminated filters are cast with a negative mold, so the surface of a laminated filter will have a shiny appearance. Wound filters are manufactured with a positive mold and subsequently wound.

The enhanced mechanical strength of wound filters makes them the recommended option for heavy duty industrial applications.

Regular cleaning of the filter media is required. Pour the accumulated debris in the filter bed into the drain to keep the filter in optimal condition.

The pressure required to filter the water increases as the filter bed accumulates dirt and debris. We therefore recommended running a flushing cycle when the difference between the inlet and outlet pressure has increased by more than 0.6 bar and avoid exceeding a pressure of 1 bar.

For more information, please request the instruction and maintenance manual from the sales department ( or download it here.

Depending on the filter configuration, the filter can be cleaned with either water or with an air compressor followed by water.

You can clean filters equipped with a nozzle plate or specific slotted tubes with an air compressor prior to cleaning with water.

This process uses air to release dirt particles trapped in the filter media and thus saves water, since the water used during the cleaning process is limited to the amount needed to carry the accumulated dirt to the top of the filter to the drain.

The filter should be managed as non-hazardous construction waste, according to the country’s laws.

Poltank recommends that the filter’s operating pressure be a maximum of 80% of the design pressure.