Description

Rainwater filter for larger roof areas. The Twin Filter can be installed in a separate manhole or vault or in a frost-protected area inside on the tank wall. Typically, standard pre-cast concrete vaults are used (1000 mm or 40-inch diameter). The filter can be delivered to the site pre-installed in the vault.

Two step cleaning system, with high level of filtering efficiency, independent of flow rate. Due to the steep inclination of the filter cartridge the debris and dirt are continuously carried away through the outlet pipe - waste stream. The cleaned water is conveyed into the storage tank.

Connection capacity for roof areas up to 7,500 ft². A bypass-installation is also available for larger roof areas.

Connections: 2 tank inlets (4-inch & 6-inch), 2 outlets to tank (4-inch & 6-inch), 2 outlets to waste stream (4-inch & 6-inch)

Depending on the amount of debris loading, the filter only has to be inspected 1 – 2 times during the year. During inspection cleaning may be necessary.

How it works

1. As water arrives the level builds up and is equally distributed across the two cascades.
2. Pre cleaning through the cascades. Largest dirt particles are led across the primary filter cascades directly to the sewer.
3. Pre filtered water then flows over the secondary filter sieve (mesh size 0.65 mm or 0.03 Inches). Due to the special mesh structure of the sieve, any dirt washes directly into the sewer.
4. The cleaned water is being absorbed in the middle tank and directed through one or the two connections into the storage.
5. Dirt goes to the sewer through the shaft.

Advice:

Due to the horizontal position of the filter cartridge, the filter gets dirtier more rapidly as a filter cartridge with steep inclination. We therefore recommend using the Backwashing Device and periodic cleaning with detergent and brush in order to degrease the filter sieve. Pollen contains grease thus the water rolls off on the surface.

Technical Data

Rainwater inlet: 2 x 4-inch
Tank inlet: 2 x 4-inch
Outlet into sewer: 2 x 4-inch

Height difference between inlet and
a. outlet into the storage: 350 mm (13.8 Inches)
b. outlet into the sewer: 510 mm (20.1 Inches)

Housing and cascade material: Polyethylene

Filter cartridge: Stainless steel 1.4301

Mesh size: 0.65 mm (0.03 Inches)

Weight: 16 kg (35.2 Pounds)

Example

Twin Filter installed in a concrete shaft.

Description

Self cleaning rainwater filter for installation in the rainwater storage tank or in the ground before the tank or in the ground before the tank. Two step cleaning system, allows high level of filtering efficiency, independent of flow rate.

The steep inclination of the filter cartridge allows debris and dirt to be continuously rinsed through the outlet pipe – waste stream. The filtered water is conveyed into the storage tank.

Low maintenance requirement; the filter insert is easily removed for inspection and cleaning and does not have to be changed.

Optional debris retention basket can be supplied.

Relative connection capacity for roof areas up to 3,500 ft².

Height difference between inlet and outlet just 300 mm (11.8 Inches).

Depending on the amount of debris loading, the filter only has to be inspected 1 - 2 times during the year. During inspection cleaning may be necessary.

How it works

1. As water arrives the level builds up and is equally distributed across the cascade.
2. Pre cleaning through the cascades. Largest dirt particles are led across the primary filter cascades directly to the sewer.
3. Pre filtered water then flows over the secondary filter sieve (mesh size 0.65 mm or 0.03 Inches). Due to the special mesh structure of the sieve, any dirt washes directly into the sewer which means the filter is self cleaning, with very low maintenance.
4. Cleaned water flows to the cistern.
5. Dirt goes to the sewer.

Technical Data

Filter according to DIN 1989-2, Type C

Connection inlet: 2 x 4-inch
Outlet into tank: 4-inch
Outlet into sewer: 4-inch

Height difference between rainwater inlet and outlet 300 mm (11.8 Inches).

Housing material: Polyethylene

Filter cartridge: Stainless steel 1.4301
Mesh size: 0.65 mm (0.03 Inches).

Material Cascade insert: Polyethylene

Weight: 6.2 kg (13.6 lbs)

Example 1

Installation with telescopic extension in the ground before a plastic tank.

Example 2

Installation before a concrete tank.

Accessories 1

3P Telescopic Extension Art.-Nr. 1000560
Plastic shaft for the installation directly in the ground. Material Polyethylene.

Accessories 2

Removal Handle Art.-Nr. 1000550
For filter removal in deeper installations.
Length: 50 cm (19.7 Inches)
Material: Stainless steel