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German Standard (DIN) for Rainwater Harvesting: technology and products. Ecological and sustainable water management is a goal of the precipitation water management . The alternatives to the customary drainage of precipitation water are , among other things,

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Ecological and sustainable water management

is a goal of the precipitation water management.

The alternatives to the customary drainage of precipitation water are, among other things,

rainwater harvesting and infiltration, as well as the decentralized retention of rainwater.

A new system technology with new components has been developed for rainwater harvesting in households and commercial and industrial companies.

The standard for rainwater harvesting was developed taking the generally-recognized rules of technology for drinking water installations into consideration according to the standard series DIN1988 and according to DIN EN 1717 and for drainage systems according to the standard series DIN EN 12056 and DIN 1986.

Requirements on system technology for the planning, installation, operation and maintenance that have proven themselves in practice are set down in this standard

DIN 1989 Rainwater Harvesting Systems


The standard series DIN 1989 „Rainwater Harvesting Systems“ consists of the following parts:

  • Part 1: Planning, Installation, Operation and Maintenance

  • Part 2: Filter for Rainwater harvesting

  • Part 3: Rainwater Reservoirs

  • Part 4: Components for Control and supplemental supply

DIN 1989 Rainwater Harvesting Systems


The standard series DIN 1989-1 „Rainwater Harvesting Systems“

Part 1: Planning, Installation, Operation and Maintenance

This standard applies to systems utilizing rainwater in households and commercial and industrial companies, as well as in public organizations, in which it is used for flushing toilets, for cooling purposes, for washing and cleaning systems and for watering green areas, for instance.

Following parts are treated:

Collection Areas, Treatment, Rainwater Reservoirs and Add-On Parts, Process Water Pumps, Supplemental Feed Systems, System Control Unit, Supplemental Feed Modules, Central Rainwater Systems and Hybrid Systems, Pipe Systems and Labelling, Seepage of the Overflow Water, Protection against Backflow, Types of systems and set up possibilities, Design of the Reservoir Size, Operation, Inspection and Maintenance

DIN 1989 Rainwater Harvesting Systems


The standard series DIN 1989-2 „Rainwater Harvesting Systems“

  • Part 2: Filter for Rainwater harvesting

    This part lay down the standard and tests for mechanical working filters which are installed

    in the supply of reservoirs for rainwater harvesting systems.

There is a multitude of special filters for rainwater harvesting systems that are distinguished by design, installation position and functional principle (e.g. filter matting , filter screen). Filters are to be installed in the supply line to the reservoir as a general rule. They keep foreign material away from the rainwater reservoir that could bring about malfunctions in the system or make the water quality poorer. Rainfall pipes or central location in front of the reservoir are possible installation places. Furthermore, filters can be directly located in the rainwater supply line inside of the reservoir.

DIN 1989 Rainwater Harvesting Systems


The standard series DIN 1989-3 „Rainwater Harvesting Systems“

  • Part 3: Rainwater Reservoirs

    This part lay down the standard, tests and assessments of conformance for manufactured

    monolithic reservoirs, for manufactured multi-parts reservoirs and for reservoirs made on-site.

Rainwater reservoirs are for both the storage and the cleaning of the rainwater.

Reservoirs can be set up both above-ground and below-ground.

The set up location should be chosen in such a way that the stored water is protected against strong thermal effects, frost and light. The selection of the reservoir has to be done in coordination with the installation location and the pollution to be expected. Standardized reservoirs are to be used.

DIN 1989 Rainwater Harvesting Systems


The standard series DIN 1989-4 „Rainwater Harvesting Systems“

  • Part 4: Components for Control and supplemental supply

    This part lay down the standard and tests for manufactured or made on-site assembly units

    for supplemental supply units for reservoirs, for system control units of process water pump and hybrid units.

Supplemental feed modules consist of a supplemental feed device and a system control unit and are usually produced in the factory as an assembly.

Process water pumps, the supplemental feed system and the system control unit are combined in one assembly in the factory into central rainwater systems.

Hybrid containers are used as a preference in larger rainwater harvesting systems.

DIN 1989 Rainwater Harvesting Systems


System Control unit Systems“

  • The system control unit controls automatically the functioning of the rainwater harvesting system

  • The supplemental feed has to be done via a safety device Type AA (unobstructed free outlet) or Type AB (free outlet with a non circular overflow) according DIN EN 1717 when drinking water is used.

  • The safety device is to be installed outside of the rainwater reservoir and outside of the entry shaft (dome).

  • For continuous operating, the rainwater harvesting system can also be operated independently of the rainwater reservoir.

DIN 1989 Rainwater Harvesting Systems


Typical Rainwater harvesting unit Systems“

for a normal household in Germany

Rainwater will be used for :

  • toilet flush

  • washing machines

  • cleaning

  • garden watering

    The unit has two main components:

  • Reservoir (here below-ground)

    with integrated four cleaning steps

    2. System control unit with

    a submersible pump and

    a supplemental feed system


  • Reservoir Systems“

  • Filter

  • Quiescent supply

  • Overflow with odor trap

  • Submersible pump with floating intake

  • Process water pump with intgrated free outlet according to DIN 1717 and system control unit

  • Process water line to toilet flush, washing machines, cleaning and garden watering

  • Cable trench for pump cable and water level recording

  • Pressure line

  • Supplemental feed line

  • Drinking water line

  • Overflow for process water pump according DIN 1717


Products for rainwater harvesting Systems“

special for cleaning rainwater

CLEAN WATER

OUR MISSION


4 cleaning steps Systems“

The first cleaning step in the rainwater system is the filter. The rainwater

flows from the roof to the filter. Here dirt particles and debris are separated

from the water. The cleaned water flows to the tank. The dirt is washed to the

storm water pipe or soakaway with a small amount of rainwater. All 3P

rainwater filters have stainless steel inserts, which are easy to remove and

easy to clean. Their many different working principles and connection

possibilities allow for their use in many different installation situations, with

the advantage of very low maintenance.

  • Cleaning step

    Filter

By using an underground tank, the water is stored in dark and cool

conditions. Here the second cleaning step takes place. In the water column,

any fine residual particles settle to the bottom of the tank. The rainwater

Calmed Inlet prevents any disturbance of this sedimentation layer. At the

same time the Calmed Inlet ensures that oxygenated water is introduced to

the lower layers of the stored water in the tank. This oxygen rich water

prevents anaerobic conditions from forming in the storage tank and

ensures that the water stays fresh.

2. Cleaning step

Calmed inlet

3. Cleaning step

Overflow siphon

Any particles that are lighter than water (e.g. flower pollen) float slowly to the

water surface. The expertly designed 3P Overflow Siphon, with a skimmer

effect, removes this floating layer. The regular overflow from the storage tank

is important to get the optimum water quality. It prevents souring of the water.

The floating layer could otherwise build up over time, and so reduce oxygen

diffusion at the water surface, which in turn could lead to anaerobic

conditions in the tank.

The 3P Pump Intake floats at all times, suspended just below the water

surface where the cleanest water lies. From this position the water is

extracted by the pump. A ball float, filled with air, suspends the intake, which

has a further filter and a check valve.

4. Cleaning step

Floating pump intake


3P Rainus

Rainwater Filter for down pipes

where the cleaned rainwater flows

on down into the down pipe! Install

in the lower section of the

down pipe. Easy to monitor, easy

to install, with secure reliable

function. Simple to maintain.

3P Leaf Separator grey

No more blocked rainwater gutters

and gullies. Accumulating leaves

and particles are continuously

filtered out. Complete with

reduction sets.

3P Filter Collector grey

Durable high quality plastic. Filters

and collects rainwater for barrels

and tanks. Overflow function.

Simple installation. Complete with

adapter and reduction sets.

3P Leaf Catcher

The 3P Leaf Catcher is simply

installed in the down pipe. It filters

out leaves and moss, and collects

it in a small basket. Install it at a

convenient height for leaf removal

from time to time.

3P Rain Collector with rough filter

The simple 3P Rainwater Collector with large slat filter

collects and filters the rainwater from small roofs for

smaller rainwater tanks. Fits down pipes made of Copper,

Aluminium or galvanised, with a 25 mm outlet

connection, screw thread or push-fit.


Backwashing Device SF and PF

Backwashing Device ZF


3P Volume Filter VF1

For roof areas up to 300 m². High level

of filtering efficiency, independent of

Flow rate. Continuous filtering of dirt

particles. Frost resistant, low

maintenance. Filter insert is easily

removed for cleaning. Materials: PE with

Stainless Steel sieve with a mesh size

of 0.65 mm.

3P Volume Filter VF1

+ Telescopic extention

Rainwater filter for roof areas up to 300 m².

High level of filtering efficiency,

independent of flow rate. Continuous

filtering of dirt particles. Frost resistant.

Self cleaning. Low maintenance

intervals Filter insert is easily removed

for cleaning. Materials: PE and stainless

steel. Stainless steel sieve with a mesh

size of 0.65 mm. Height 470 mm. Height

difference between inlet and outlet just

300 mm.

Extension tube for direct installation in

the ground Installation depth up to

750 mm Diameter 500 mm. Extension

tube delivered with locking lid. Lid

supports pedestrian loading.

  • As water arrives the level builds up and is equallydistributed across the cascade

  • Pre cleaning through the cascades. Largest dirt particles are led across the primary filter cascades directly to the storm water.

  • Pre filtered water then flows over the secondary filter sieve (mesh size 0.65 mm). Due to the special mesh structure of the sieve, any dirt washes directly into the storm water which means the filter is self cleaning, with very low maintenance.

  • Cleaned water flows to the cistern.

  • Dirt goes to the storm water.


3P Volume Filter VF2

Rainwater filter for roof areas up to

850 m2. Filter for installation in

concrete ring (diameter 100 cm). Low

maintenance. Filter insert easily removed

for cleaning. Material: stainless steel.

3P Volume Filter VF3

Rainwater filter for roof areas up to

1100 m2. Filter for installation in

concrete ring (diameter 120 cm) Low

maintenance. Filter insert easily removed for

cleaning. Material: stainless steel.

3P Volume Filter VF4

Rainwater filter for roof areas up to

1700 m2. Filter for installation in

concrete ring (diameter 120 cm). Low

maintenance. Filter insert easily removed for

cleaning. Material: stainless steel.

  • As rain water arrives the water level builds up, and runs over the filter lip, so ensuring it is distributed evenly across the whole width of the filter cascade.

  • Pre cleaning through the cascades. Larger dirt particles are washed across the cascades directly to the sewer.

  • Pre filtered water then flows over the secondary filter (mesh size 0.65 mm). Due to the special structure of the sieve mesh, any dirt is washed directly into the storm water which means the filter is self cleaning, low maintenance.

  • Cleaned water flows to the storage tank.

  • Dirt goes to the storm water.

3P Volume Filter VF6

Rainwater filter for roof areas up to

2350 m2. Filter for installation in

concrete ring (diameter 120 cm). Low

maintenance. Filter insert easily removed for

cleaning. Material: stainless steel.


4 cleaning steps Systems“

The first cleaning step in the rainwater system is the filter. The rainwater

flows from the roof to the filter. Here dirt particles and debris are separated

from the water. The cleaned water flows to the tank. The dirt is washed to the

storm water pipe or soakaway with a small amount of rainwater. All 3P

rainwater filters have stainless steel inserts, which are easy to remove and

easy to clean. Their many different working principles and connection

possibilities allow for their use in many different installation situations, with

the advantage of very low maintenance.

  • Cleaning step

    Filter

By using an underground tank, the water is stored in dark and cool

conditions. Here the second cleaning step takes place. In the water column,

any fine residual particles settle to the bottom of the tank. The rainwater

Calmed Inlet prevents any disturbance of this sedimentation layer. At the

same time the Calmed Inlet ensures that oxygenated water is introduced to

the lower layers of the stored water in the tank. This oxygen rich water

prevents anaerobic conditions from forming in the storage tank and

ensures that the water stays fresh.

2. Cleaning step

Calmed inlet

3. Cleaning step

Overflow siphon

Any particles that are lighter than water (e.g. flower pollen) float slowly to the

water surface. The expertly designed 3P Overflow Siphon, with a skimmer

effect, removes this floating layer. The regular overflow from the storage tank

is important to get the optimum water quality. It prevents souring of the water.

The floating layer could otherwise build up over time, and so reduce oxygen

diffusion at the water surface, which in turn could lead to anaerobic

conditions in the tank.

The 3P Pump Intake floats at all times, suspended just below the water

surface where the cleanest water lies. From this position the water is

extracted by the pump. A ball float, filled with air, suspends the intake, which

has a further filter and a check valve.

4. Cleaning step

Floating pump intake


2. Cleaning step Systems“

Calmed Inlet

3P Calmed Inlet

3P Calmed Inlet 125 mm/110 mm Provides a calmed inlet for rainwater in

the storage tank. Prevents disturbance of settled sedimentation layer and

oxygenises lower layer of water


4 cleaning steps Systems“

The first cleaning step in the rainwater system is the filter. The rainwater

flows from the roof to the filter. Here dirt particles and debris are separated

from the water. The cleaned water flows to the tank. The dirt is washed to the

storm water pipe or soakaway with a small amount of rainwater. All 3P

rainwater filters have stainless steel inserts, which are easy to remove and

easy to clean. Their many different working principles and connection

possibilities allow for their use in many different installation situations with

the advantage of very low maintenance.

  • Cleaning step

    Filter

By using an underground tank, the water is stored in dark and cool

conditions. Here the second cleaning step takes place. In the water column,

any fine residual particles settle to the bottom of the tank. The rainwater

Calmed Inlet prevents any disturbance of this sedimentation layer. At the

same time the Calmed Inlet ensures that oxygenated water is introduced to

the lower layers of the stored water in the tank. This oxygen rich water

prevents anaerobic conditions from forming in the storage tank and

ensures that the water stays fresh.

2. Cleaning step

Calmed inlet

3. Cleaning step

Overflow siphon

Any particles that are lighter than water (e.g. flower pollen) float slowly to the

water surface. The expertly designed 3P Overflow Siphon, with a skimmer

effect, removes this floating layer. The regular overflow from the storage tank

is important to get the optimum water quality. It prevents souring of the water.

The floating layer could otherwise build up over time, and so reduce oxygen

diffusion at the water surface, which in turn could lead to anaerobic

conditions in the tank.

The 3P Pump Intake floats at all times, suspended just below the water

surface where the cleanest water lies. From this position the water is

extracted by the pump. A ball float, filled with air, suspends the intake, which

has a further filter and a check valve.

4. Cleaning step

Floating pump intake


3. Cleaning step – Systems“ Overflow

3P Overflow Siphon mono

Overflow siphon, with rodent and odour

barrier, with skimming effect on tank water

surface from sloped inlet slots.

3P Overflow Siphon duo

3P Overflow siphon duo is installed between

the filter and the tank. Overflow inside the

rainwater tank.

  • As the tank water level rises, the water flows over the skimmer siphon inlet into the storm water or to an infiltration soakaway. Any floating pollen particles are literally sucked by the skimmer openings.

  • The surplus water with the pollen is led out of the rainwater tank. Outlet 110 mm.

  • An Odour Trap is provided by the siphon.

  • Connection filter side for 110 mm pipe (3P Overflow siphon duo).

  • Rodent entry is prevented, because of the slim slots.

3P Overflow Siphon uno

3P Overflow Siphon Uno with screw

threaded union connector, ideal for

installation through plastic tank walls.


4 cleaning steps Systems“

The first cleaning step in the rainwater system is the filter. The rainwater

flows from the roof to the filter. Here dirt particles and debris are separated

from the water. The cleaned water flows to the tank. The dirt is washed to the

storm water pipe or soakaway with a small amount of rainwater. All 3P

rainwater filters have stainless steel inserts, which are easy to remove and

easy to clean. Their many different working principles and connection

possibilities allow for their use in many different installation situations with

the advantage of very low maintenance.

  • Cleaning step

    Filter

By using an underground tank, the water is stored in dark and cool

conditions. Here the second cleaning step takes place. In the water column,

any fine residual particles settle to the bottom of the tank. The rainwater

Calmed Inlet prevents any disturbance of this sedimentation layer. At the

same time the Calmed Inlet ensures that oxygenated water is introduced to

the lower layers of the stored water in the tank. This oxygen rich water

prevents anaerobic conditions from forming in the storage tank and

ensures that the water stays fresh.

2. Cleaning step

Calmed inlet

3. Cleaning step

Overflow siphon

Any particles that are lighter than water (e.g. flower pollen) float slowly to the

water surface. The expertly designed 3P Overflow Siphon, with a skimmer

effect, removes this floating layer. The regular overflow from the storage tank

is important to get the optimum water quality. It prevents souring of the water.

The floating layer could otherwise build up over time, and so reduce oxygen

diffusion at the water surface, which in turn could lead to anaerobic

conditions in the tank.

The 3P Pump Intake floats at all times, suspended just below the water

surface where the cleanest water lies. From this position the water is

extracted by the pump. A ball float, filled with air, suspends the intake, which

has a further filter and a check valve.

4. Cleaning step

Floating pump intake


4. Cleaning step – Systems“ Floating pump intake

3P Floating Pump Intake

For the extraction of the cleanest rainwater

from the storage tank. Connects to suction

pipes 25 mm and 32 mm.

  • Floating ball, diameter 15 cm

  • Filter inlet sleeve, mesh width 1.2 mm

  • Check valve, 25 mm and 32 mm.

  • Connection spout 25 mm and 32 mm.

3P Submersible Pump Base

Housing to fix a submersible Pump on the

bottom of a rainwater tank and to connect a

floating Pump intake.

  • Floating ball, diameter 15 cm

  • Filter inlet sleeve, mesh width 1.2 mm

  • Check valve, 25 mm and 32 mm.

  • Connection spout 25 mm and 32 mm.


4 cleaning steps Systems“

The first cleaning step in the rainwater system is the filter. The rainwater

flows from the roof to the filter. Here dirt particles and debris are separated

from the water. The cleaned water flows to the tank. The dirt is washed to the

storm water pipe or soakaway with a small amount of rainwater. All 3P

rainwater filters have stainless steel inserts, which are easy to remove and

easy to clean. Their many different working principles and connection

possibilities allow for their use in many different installation situations with

the advantage of very low maintenance.

  • Cleaning step

    Filter

By using an underground tank, the water is stored in dark and cool

conditions. Here the second cleaning step takes place. In the water column,

any fine residual particles settle to the bottom of the tank. The rainwater

Calmed Inlet prevents any disturbance of this sedimentation layer. At the

same time the Calmed Inlet ensures that oxygenated water is introduced to

the lower layers of the stored water in the tank. This oxygen rich water

prevents anaerobic conditions from forming in the storage tank and

ensures that the water stays fresh.

2. Cleaning step

Calmed inlet

3. Cleaning step

Overflow siphon

Any particles that are lighter than water (e.g. flower pollen) float slowly to the

water surface. The expertly designed 3P Overflow Siphon, with a skimmer

effect, removes this floating layer. The regular overflow from the storage tank

is important to get the optimum water quality. It prevents souring of the water.

The floating layer could otherwise build up over time, and so reduce oxygen

diffusion at the water surface, which in turn could lead to anaerobic

conditions in the tank.

The 3P Pump Intake floats at all times, suspended just below the water

surface where the cleanest water lies. From this position the water is

extracted by the pump. A ball float, filled with air, suspends the intake, which

has a further filter and a check valve.

4. Cleaning step

Floating pump intake


CLEAN WATER Systems“

OUR MISSION


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