Volume Filter – VF4

Volume Filter VF4


Rainwater filter for larger roof areas. Filter for installation in a concrete ring (Ø 1200 mm). Normally standard concrete shafts are used. The filter can be delivered to the site yet pre-assembled in the shaft.

Two step cleaning system, gives a high level of filtering efficiency, independent of flow rate.

Due to the steep inclination of the filter cartridge the dirt is continuously cleaned away into the sewer. The connection to the sewer is installed at the shaft. The dirt falls down on the bottom of the shaft and is washed away with the next strong rainfall.

Relative connection capacity according to DIN 1986 for roof areas up to 2300 m². Because of a Bypass-Installation a bigger area can be connected.

Inlet rainwater 2 x DN 250
Outlet into storage DN 150
Outlet into sewer DN 250
Height difference between inlet and outlet 320 mm.

The filter has to be cleaned depending on the contamination 1 – 2 times during the year.

How it Works

  1. As water arrives the level builds up and flows over tops the filter lip, so ensuring it is distributed evenly across the whole width of the filter cascade.
  2. The largest dirt particles flow across the primary filter and fall to the bottom of the shaft.
  3. The pre filtered water then flows over the secondary filter sieve (Mesh size 0.4 x 1 mm). Due to the special mesh structure of the sieve, any dirt falls directly down onto the bottom of the shaft. In case of heavy rainfalls, the filter has more loss, as the water washes away the filtered dirt into the sewer.
  4. The cleaned water is being absorbed in the lower tank and directed through a tube DN 150 outlet.
  5. Dirt goes to the sewer through the shaft.

Technical Data

Product Code: 1000850

Filter according to DIN 1989-2, Type C

Connection inlet: 2 x DN 250
Outlet into the storage: DN 150
Outlet into the sewer: DN 250

Height difference between inlet and outlet 320 mm.

Material Filter body: stainless steel
Material Filter sieve: stainless steel
Mesh size: 0.4 x 1 mm

Legs = Thread rods M10 with screw nut made of stainless steel, Length 250 mm

Weight: 39.5 kg


VF4 Dimensions

Dimensions: A-670mm B-540mm C-525mm D-980mm F-275mm G-880mm

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