Purain

Our self-cleaning rainwater harvesting filter is what your project needs to make the most of rainwater. Purain helps reducing your water consumption with sustainable space. It is also excellent as pre-filtration for Aqualoop technology.

The best water quality

PURAIN filters ensure optimum water quality in your rainwater cistern. They are suitable for filtering rainwater coming into a tank from roof surfaces with clay tiles, slate, metal, glass, or concrete blocks, or for pre-filtering greywater.

Simple and effective design

Thanks to their unique and patented design, the filters are characterized by maximum efficiency with the lowest maintenance requirements. PURAIN filters are successfully used in more than 40,000 rainwater and greywater systems worldwide. They are virtually indestructible, require no maintenance components, and are therefore particularly sustainable. The high-quality stainless steel slotted sieve reliably filters pollutants from rainwater.


Purain in action.
Purain in action.

Simple and effective design

Thanks to their unique and patented design, the filters are characterized by maximum efficiency with the lowest maintenance requirements. PURAIN filters are successfully used in more than 40,000 rainwater and greywater systems worldwide. They are virtually indestructible, require no maintenance components, and are therefore particularly sustainable. The high-quality stainless steel slotted sieve reliably filters pollutants from rainwater.

Automatic cleaning and low maintenance

Trapezoidal profiles prevent dirt from adhering. Dirt accumulates in a depression behind the screen until it is drawn into the overflow by the so-called hydraulic alternating jump during a heavy rain event.

In greywater treatment systems, the filter is automatically cleaned with the help of a backwash nozzle. In case of storage tank overflow, the filter is also cleaned. Simple and effective design.

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