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Please note that due to the festive season as well as the onset of Loadshedding orders may be slightly delayed in being dispatched but we are doing our best to get them out as soon as possible. We value your patience at this time.

We would like to thank everyone for their support throughout the year and wish you all a wonderful festive season and a happy new year. Please note we will be closed from Friday 21st December 2018 at 12h00 and re-open on Monday 9th January 2019 at 09h00. We will not be processing any further orders after 12h00 on Friday 14th December 2018. Any orders placed after this date will only be processed in the new year. There will be limited availability on all products from Monday 10th December 2018.

Purain PR100 Rainwater Filter with Non Return Valve

PURAIN rainwater filters (also known as hydraulic jump filters) deliver high performance in the filtering of rainwater and this hydraulic jump technology means that the filter cleans itself automatically. The design incorporates a height drop, which, from a sub-critical to a super-critical flow, creates a vortex in the incoming water flow. This change in flow is a process now commonly referred to as a hydraulic jump. The resulting increase in water power is similar to a strong eddy and forces any impurities, collected in the filter chamber over the next level, to be washed away to waste.

NB: Ideal for installation in both above ground and below ground tanks.

Download specifications sheet here.

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Excl. Tax: R 6,116.52 Incl. Tax: R 7,034.00

Product Description


PURAIN rainwater filters are designed to filter rainwater coming off roofing made from clay brick, shales, tiles, metal, glass or concrete stone. Different model sizes filter water from roof areas of 60 m2 to over 15,000 m2. Independently tested, the PR100 is rated as one of the most efficient rainwater filters in the world - at 98% collection efficiency (this means that for every 100 litres of rain falling on your roof, your filter will collect 98 litres). It has been designed to collect rainwater especially from ‘light” rainfall events and uses the “heavy” events for self-cleaning.

This efficient design is very important, as studies have shown that 97% of all world rainfall comes from “light events” (measured at less than .6mm over 5 minutes), leaving only 3% of rainfall coming from “heavy events” (measured at more than .6mm over 5 minutes). As most other filters are not designed along this scientific principal, they cannot adequately collect light events without wastage, with the result that they end up with collection efficiencies of between only 60 - 70% – meaning they waste large quantities of valuable rainwater.

PR100 and PR100oRS models offer the following features:
 • High collection efficiency - collecting 98% of all rainfall falling on your roof.
 • Built-in overflow skimmer to constantly clean debris floating on the tank water.
 • Built-in non-return valve and chamber cover for both rodent and backflow protection (PR100 only).
 • Hydraulic jump design – self-cleaning.
 • Minimal maintenance needed.
 • Only one filter needed for each installation – even if multiple tanks are used.
 • Indestructible .8mm removable stainless steel filter strainer.
 • European manufacture – sturdy injection moulding that will outlast the life of your tank.

Additional Information

Additional Information

Disclaimer Please note that stock availability is subject to prior sales. Prices exclude delivery. The image serves as an example of what the product looks like and may differ slightly in appearance.
Guarantee/ Warranty 12 month product warranty
Water Recycling Product Type Rain Water Storage


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