Rainwater units for an uninterrupted water supply

The WISY rainwater units ensure that clear water is always available for use - and they do this completely automatically in the background, without you noticing.

A rainwater unit takes water from the cistern and feeds it under pressure into the rainwater pipe network. When the toilet is flushed, for example, the rainwater unit ensures that more water is added.

In doing so, it controls the entire rainwater system. It checks the fill level in the cistern and automatically replenishes it with tap water if there is not enough rain. This ensures that all consumers are supplied with water at all times.

Carefree use of rainwater thanks to reliable operation? With WISY rainwater units, you always have water when and where you need it - regardless of whether it is rainwater or tap water!

Precisely tailored to your specific application

Even though every rainwater system relies on the same components at its core, it always has its own specific requirements. WISY offers you a custom-fit solution for every situation - whether single-family or multi-family homes, commercial or industrial buildings, sports facilities or public facilities.

The right rainwater unit is selected on the basis of your requirements, such as the required system pressure, the desired flow rate and the distance and height difference from the cistern to the wall-mounted unit.

WISY offers rainwater units that pump the rainwater directly from the cistern using a submersible pressure pump (Multimat) or with a self-priming pump built into the wall-mounted unit (Sigma). A combination of both for long distances and height differences is also available (Optima and Optima Plus). If a particularly high supply capacity is required, the Maxima rainwater unit is used. Depending on the variant, it can supply up to eight households and is also used in industry and commerce.

Standard-compliant and energy-efficient

All WISY rainwater harvesting units ensure automatic and on-demand replenishment with tap water, so that an uninterrupted water supply is always guaranteed without your intervention. All replenishment devices are standard-compliant and therefore fully meet the requirements of the Drinking Water Ordinance.

Thanks to the ZETA 02 pump controller integrated in all units, the rainwater units only require 0.2 watts in standby mode, making them 97 % more economical during standby than conventional systems. Conserve the valuable resource of water and do it in an energy-efficient way? Easy with WISY!

OVerview of WISY rainwater units

Product information

Multimat rainwater unit

The Multimat rainwater unit uses a submersible pump to pump rainwater out of the storage tank and feeds it under pressure into the rainwater pipe network. It controls the system, checks the fill level of the storage tank and, if necessary, automatically ensures that drinking water is fed into the rainwater storage tank.

The Multimat rainwater unit works with two separate cables from the cistern to the wall-mounted unit. This ensures simple installation and long-term operational reliability. Two sockets must be provided on site.

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InfoImportant details

Compact and quiet Drinking water feed into the cistern as required Only 0.2 watts standby consumption Submersible pump in the cistern Max. Delivery rate/height: 125 l/min or 49.4 m For long delivery distances and greater height differences

Product information

Sigma rainwater unit

The fully automatic Sigma rainwater unit supplies a single-family house with rainwater.

It takes rainwater from the cistern and feeds it under pressure into the rainwater pipe network. The unit controls the entire rainwater system, checks the fill level of the storage tank and automatically switches over to the use of drinking water if necessary.

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InfoImportant details

Compact and economical Automatic switching between rainwater and drinking water Only 0.2 Watt standby consumption Suction pump in wall unit Max. Delivery rate/height: 66 l/min or 44 m Ideally suited for single-family houses

Product information

Optima rainwater unit

The rainwater unit combines all the components required for operation in one unit, pumps the water from the rainwater storage tank and feeds it under pressure into the rainwater pipe network.

The rainwater unit controls the entire rainwater system, checks the fill level of the storage tank and, if necessary, automatically provides the drinking water feed within the wall-mounted unit.

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InfoImportant details

Compact and economical Automatic switching between rainwater and drinking water Only 0.2 Watt standby consumption Two pumps for stable pressure conditions: Charging pump in the cistern & pressure pump in the wall-mounted unit Max. Flow rate: 70 l/min; up to 5 bar system pressure Convenient solution for detached and semi-detached houses

Product information

Optima Plus rainwater unit

The OPTIMA PLUS rainwater unit combines all the components required for operation in a single unit. It enables the water to be conveyed from the rainwater storage tank over long conveying distances and large delivery heads and feeds it into the rainwater pipe network under pressure.

Controls the entire rainwater system, checks the fill level of the storage tank and, if necessary, automatically ensures drinking water replenishment within the wall-mounted unit.

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InfoImportant details

For long distances or height differences from cistern to wall unit Supplementation of drinking water via the replenishment tank in the wall-mounted unit Only 0.2 watts standby consumption Double fail-safe: Separate pumps for rainwater or drinking water operation Max. Flow rate/height: 70 l/min or 47 m; up to 4.7 bar system pressure; up to 50 m cable extension possible

Product information

Maxima rainwater unit

The Maxima rainwater unit ensures a high supply capacity thanks to the large hybrid tank. It combines all components required for the operation of the rainwater supply system according to the two-pressure pump principle.

The rainwater is pumped from the rainwater storage tank into the buffer tank of the hybrid system by means of the underwater charge pump. From there, the submersible pressure pump supplies the consumption points. Drinking water is replenished directly into the unit's hybrid tank as needed, buffer volume 350 l for high demand peaks.

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InfoImportant details

High supply and operating safety due to 350 l buffer volume Supplementation of drinking water via the make-up tank Only 0.2 Watt standby consumption Two submersible pressure pumps: in the cistern and in the storage tank Max. Delivery rate/height: 120 l/min or 49 m Plug-in system, requires no electrical work

Suitable connection sets for rainwater units

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