Example of Purain self cleaning rainwater filter when there is high rainfall
Purain
Pre-Filter Water Filter for Rainwater
Hydraulic jump filters with self-cleaning technology for maximum rainwater capture.
Self-cleaning Purain rainwater inlet pre-filters have the highest rainwater capture of clean rainwater with exclusive hydraulic jump technology patented by INTEWA.
Using the unique jump filter design, Purain filters catch 100% of rainfall up to a certain flow rate. At higher flow rates, the filter is vigorously cleaned using what is called a hydraulic jump action. This leads to the highest overall water capture efficiency regardless of geography.
For grey water and storm water management applications, Purain pre-filters guarantee an effective reduction of debris, and provide a cleaner water to process for end use applications.
PURAIN Product Range
PURAIN filters come in a wide range of sizes from 4” to 16” inlets.
Commercial
Applications
PURAIN 8” to 16”
Description
This PURAIN product line is developed for in-tank installations or wall mounting. The filters are sized for pipe diameters of 8”, 12” and 16” SDR 35 PVC.
Technical PDF Downloads
Product Article Numbers
- 8” PURAIN filter DN200/Article number: 210145
- 12” PURAIN filter DN300/Article number: 210155
- 16” PURAIN filter DN400/Article number: 210165
Heavy Duty Commercial
Direct Bury Applications
PURAIN HD 8” to 16”
Description
The PURAIN HD line is designed for underground installation with a vehicle rating up to 60 tons. These filters are accessible with conventional manhole lids and concrete rings, and they are sized for pipe diameters of 8”, 12” & 16” SDR 35 PVC.
Technical PDF Downloads
Product Article Numbers
- 8” PURAIN filter HD DN200/Article number: 210146
- 12“ PURAIN filter HD DN300/Article number:210156
- 16” PURAIN filter HD DN400/Article number: 210166
Large Roofs and Grey Water
Recycling Applications
PURAIN 6” and 8”
Description
This PURAIN product line is the most versatile and cost effective. The injection molded filter can be buried, mounted inside the cistern, or mounted externally. For in-tank mounting, they have a skimmer overflow.
Technical PDF Downloads
Product Article Numbers
- 6” PURAIN Filter DN150-S with skimmer :210176
- 6” PURAIN Filter DN150 without skimmer: 210178
- 6″-8″ PURAIN Filter DN 150-200 with skimmer: 210154
- 6″-8″ PURAIN Filter DN 150-200 without skimmer: 210153
Small Roofs and Greywater
Recycling Applications
PURAIN 4″
Description
Ideal for small single-family house, the PURAIN (4”) includes a non-return valve, small animal protection, and skimmer overflow. It is also available without the non-return valve.
Technical PDF Downloads
Product Article Numbers
- PURAIN filter DN100 with skimmer, without non-return valve/Article: 210136
- PURAIN filter DN100 with skimmer and non-return valve /Article: 210135
PURAIN INNOVATION
& TECHNOLOGY
Hydraulic Jump
PURAIN filters capture every single drop of water up to a high rainfall rate. When a heavy rain comes, the hydraulic jump with patented self-cleaning technology quickly flushes any accumulated debris out. This makes the PURAIN filter super reliable and assures outstanding water quality with more water in the tank.
Minimal Elevation Loss
All PURAIN filters have elevation loss of less than 1 pipe diameter. This also allows for in-tank installation to provide many additional benefits.
Heavy Duty Construction
The 8” to 16” filters have a heavy-duty option for direct burial, meaning the added cost of a vault is eliminated. With their very sturdy and robust construction, PURAIN reaches the deepest direct burial depth (without a vault) of any leading rainwater inlet pre-filter with up to 7’6” depth and 60-ton vehicle loading possible.
Smart Design
Easy installation minimizes costs in any configuration. You can install PURAIN filters easily inside the tank, outside the tank, directly buried, even for retrofits. Easy connections make installation a breeze.
800 Micron Wedge Durable Stainless Steel Wire Screen
The PURAIN screen meets ASPE/ARCSA 63 standards and delivers higher flow of clean water to the tank than the other leading self-cleaning filters. Its trapezoidal shape and diagonally set profile prevents debris from settling and clogging it. The robust screen is durable and never needs replacing.
Integrated Non-Return Valve and Small Animal Protection in 4” Model
The design of PURAIN 4” features a non-return valve which stops small animals and mosquitos from entering the tank.
Integrated Overflow Skimmer
The 4” and 6” PURAIN filters have an integrated skimmer to assure great water quality in the tank. Floating debris such pollen is skimmed away from the water surface through the side pockets. From here, the debris is directly channeled out to overflow and wastewater connection. The overflow skimmer adds a further cleaning process to the tank water.