Sigma rainwater unit
€1,664.81*
- Fully automatic rainwater unit for supplying a single-family house with rainwater
- Compact and economical
- Suction pump in the wall-mounted unit for pumping directly from the rainwater storage tank to the consumers
- Automatic switching between rainwater and drinking water according to availability (manual switching possible)
- Standard-compliant drinking water replenishment with free outlet in integrated replenishment tank
- With ZETA 02 pump controller: Less than 0.2 Watt in standby mode
Available, delivery time: 2-5 days
The fully automatic Sigma rainwater unit for supplying a single-family house with rainwater.
It takes rainwater from a storage tank and feeds it under pressure into the rainwater pipe network. The unit controls the entire rainwater system, checks the level of the storage tank and, if necessary, automatically switches over to the use of drinking water.
Complies with DIN 1989 and DIN EN 1717.
Dimensions of the Sigma wall-mounted unit (in mm): W 500 x H 510 x D 315
Scope of delivery
- Self-priming pump Aspri Plus, optionally with 3 or 4 bar system pressure
- Zeta 02 pump controller with pressure gauge for pressure indication
- Integrated 9-litre make-up reservoir
- Cover
- Float switch for controlling the drinking water make-up, cable length 15 metres
- Labelling set
The installation and operating instructions for this product are provided in German and English only. By purchasing this product, you agree to this.
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More WISY products
Matching connection sets
Rainwater works
Article number
| SIGMA 3 | without level indicator | RZ 1003 |
| SIGMA 4 | without level indicator | RZ 1004 |
Technical data
| SIGMA 3 | SIGMA 4 | ||
|---|---|---|---|
| Equipment | |||
| Pump in wall unit | Aspri Plus 15/3 | Aspri Plus 15/4 | |
| Pump controller | Zeta 02 | ||
| Hydraulic data | |||
| Operating pressure | 3,3 bar | 4,4 bar | |
| Flow rate max | 65 l/min | 65 l/min | |
| Switch-on pressure of the rainwater unit | 1.5 bar | ||
| min. Switch-off pressure of the rainwater unit | 2.2 bar | ||
| Maximum start-up frequency | 20 times per hour | ||
| Pumped media | Filtered rainwater, drinking water (no sand content) | ||
| Intermediate storage capacity | 9l | ||
| Electrical data | |||
| Max power consumption | 608W | 808W | |
| Power consumption standby | < 0,2 W | ||
| Mains connection | 230 V, 50 Hz, single-phase | ||
| Rated current | 2,7 A | 3,5 A | |
| SIGMA mains cable (pump controller) | 1.4 m, with plug (3 x 1 mm²) | ||
| Float switch | 15 m, free cable end (3 x 1 mm²) | ||
| Water connections of the rainwater unit | |||
| Inlet from cistern | 1" external thread | ||
| Output to the consumers | 1" male thread | ||
| Drinking water connection | ³/₄" external thread | ||
| Noise emission | |||
| Rainwater operation | 45 dB (A) | 47 dB (A) | |
| Drinking water mode | 63 dB (A) | 63 dB (A) | |
| Ambient conditions | |||
| Max. water temperature | 35° C | ||
| max. ambient temperature | 40° C | ||
| Dimensions | |||
| Wall unit (width x depth x height) | 500 mm x 315 mm x 510 mm |
Structure and field of application
The SIGMA rainwater unit is ideally suited for use in single-family homes , as almost all components are combined in a single housing. This includes the economical ZETA 02 pump controller, the suction and pressure pump and the drinking water feed. Thanks to its compact design, the SIGMA rainwater unit is particularly easy to install , typically in the plant room or cellar. The integrated display also makes it possible to read the pressure in the rainwater pipe.
How it works
The SIGMA rainwater unit draws rainwater from the cistern and generates the necessary pressure in the rainwater pipe network. When the tapping points are closed, the pump in the SIGMA switches off automatically after a short time. However, as soon as a tapping point is opened or the toilet is flushed and a pressure drop is thus detected, the pump controller immediately switches the pump on again. As soon as all tapping points are closed and the line pressure rises again, the pump switches off again automatically .
Uninterruptible water supply
During a prolonged dry period , the system automatically switches to drinking water operation, with the float switch in the cistern serving as a sensor . If necessary, the SIGMA rainwater unit can also be switched manually to drinking water mode . In addition, a small intermediate storage tank in the rainwater unit ensures an uninterrupted water supply in the rainwater pipe network at all times.
Up to 97 % more economical than other rainwater harvesting systems in standby mode.
The controls of many rainwater units have a power consumption of up to 15 watts in standby mode , which accounts for most of the energy required for rainwater utilisation. With the efficient ZETA 02 pump controller, developed in cooperation with the Technical University of Central Hesse, the standby consumption is reduced to less than 0.2 wat ts. This means energy savings of up to 97 % compared to conventional rainwater units. The ZETA 02 is included as standard in the SIGMA rainwater works