PURAIN pre-filter

• patented, self-cleaning filter
• with stainless steel trapezoidal gap sieve

Self-cleaning filter utilizing the hydrologic jump principal designed for rainwater harvesting. Comes with integrated skimmer for removal of surface debris and a non-return valve(small animall protection).

• PURAIN Rainwater filter for a single family dwelling
• for discharge pipes up to DN100
• with stainless steel trapezoidal gap sieve
• with integrated skimmer overflow
• minimal height offset
• minimal maintenance intervals
• removing dirt by immersing the sieve
• self-cleaning due to the hydraulic jump effect
• integrated non-return valve
• minimal blocking due to the trapezoidal gap sieve design
• filter cleaning efficiency is maintained with the use of the backflushing nozzle, the nozzle flushes the sieve clean from behind
• minimal blocking due to distribution over the total sieve surface
• immediate filtering = no start-up losses
• minimal tilt sensitivity

• patented, self-cleaning filter
• for rainwater harvesting
• for greywater recycling systems
• with skimmer
• with stainless steel trapezoidal gap sieve
• for cistern, wall and underground assembly

• Minimum height offset 
• Minimum maintenance intervals 
• The dirt is loosened by dipping the sieve 
• Self-cleaning through the hydraulic jump effect (when using rainwater) 
• Minimal clogging due to the trapezoidal slotted screen design
• Immediate filtering = no start-up losses
• prepared for the installation of backwash nozzles (required for grey water applications)
• PURAIN Rainwater filters for industrial, public or commercial buildings.
• This series is developed for in tank installation, wall mounting or in a separate chamber
• for discharge pipes up to DN200

• The PURAIN-HD (Heavy Duty) model SLW60 (Heavy duty vehicles up to 60 tons), is designed as a subsurface variant.
• PR-HD rainwater water filters are made accessible with conventional manhole lids and rings.
• for discharge pipes up to DN200

• PURAIN Rainwater filters for industrial, public or commercial buildings.
• this series is developed for in tank installation, wall mounting or in a separate chamber
• for discharge pipes up to DN300

• The  PURAIN-HD (Heavy Duty) model SLW60 (Heavy duty vehicles up to 60 tons), is designed as a subsurface variant.
• PR-HD rainwater water filters are made accessible with conventional manhole lids and rings.
• for discharge pipes up to DN300