Rainwater unit Optima 4
€2,165.80*
- Fully automatic rainwater system for supplying rainwater to detached and semi-detached houses
- Two pumps for stable pressure conditions: Feeder pump in the rainwater storage tank and pressure pump in the wall-mounted unit
- Automatic switching between rainwater and mains water, Standard-compliant mains water top up with free outlet inside the integrated 9 litre tank
- With ZETA 02 automatic switch: Less than 0.2 watts in standby mode.
Available, delivery time: 2-5 days
The rainwater unit combines all the components required for operation in one device, pumps the water from the rainwater storage tank and feeds it under pressure into the rainwater pipe network.
Controls the entire rainwater system, checks the fill level of the storage tank and, if necessary, automatically ensures mains water top up within the wall-mounted unit.
Plug-in version complies with DIN EN 1717 and DIN 1989.
Dimensions of Optima wall-mounted units (mm): W 500 x H 510 x D 315
Scope of delivery
Wall-mounted unit in the house:
- normal-priming, multistage centrifugal pump
- Zeta 02 automatic switch, switch-on pressure 1.5 bar with manometer
- Automatic mains water top up via 9-litre storage tank
- Cover, wall bracket
- Labelling set
Submersible pump in the cistern:
- Provedo VX submersible pressure pump with fixed, vertical float switch, 20 m connection cable, 1" nozzle with non-return valve on the pressure side, 3 m lifting rope and hook screw.
- Baseplate 22 cm x 22 cm for submersible pressure pump, made of stainless steel
- Floating suction fine filter made of stainless steel, mesh size 0.3 mm, with 1 m highly flexible suction hose
The installation and operating instructions for this product are provided in German and English only. By purchasing this product, you agree.
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Worldwide shipping
FREE SHIPPING WITHIN GERMANY FOR ORDERS OVER €50.
Once your order has been placed, you will receive a confirmation email informing you that our shipping team has received your order. Once your order has been processed, you will receive an email notification with your tracking information. Shipping costs will not be refunded in the event of a return. We ship with:
Uninterrupted water supply
If, in a period of dry weather the Rainwater storage tank should become empty, the system automatically switches to mains water mode, with the float switch in the cistern serving as a sensor .
Up to 97 % more economical in standby
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 control system, developed in cooperation with the Technical University of Hesse, THM in Giessen the standby consumption is reduced to less than 0.2 watts. This means energy savings of up to 97 %in Standby mode, compared to conventional rainwater units. The ZETA 02 is included as standard in the OPTIMA rainwater units.
Pump logic
OPTIMA 4 and OPTIMA 5 are equipped with two pumps : a submersible pump in the cistern and a centrifugal pump in the rainwater unit. This combination enables a delivery rate of up to 65 litres per minute to the tapping points, even with a supply line length of up to 25 metres between the cistern and the rainwater works. Normally, both pumps work together, but during low rainfall, the pump in the rainwater works takes over operation alone when the top up is active.
Matching Accessories
other Rainwater units
Article number
| Optima 4 | RW 9924 |
| Optima 5 | RW 9925 |
Technical data
| OPTIMA-4 | OPTIMA-5 | ||
|---|---|---|---|
| Equipment | |||
| Centrifugal pump in rainwater unit | Prism 15/3 | Prisma 15/4 | |
| Submersible pump in the cistern | Provedo VX | ||
| Automatic switch | Zeta 02 | ||
| Electrical parameters | |||
| Power consumption centrifugal pump | 600 W | 800 W | |
| Power consumption submersible pump | 510 W | 510 W | |
| Power consumption stand-by / standby mode | < 0,2 W | ||
| Mains connection | 230 V, 50 Hz, single-phase | ||
| Max. Current consumption of entire system | 10 A | ||
| Mains connection cable rainwater system | 1.5 m (3 x 1.0 mm²) | ||
| Submersible pump connection cable | 20 m (3 x 1.0 mm²) | ||
| Protection class against environmental influences | |||
| Submersible pump | IP 68 | ||
| Water connections of the rainwater system | |||
| Cistern connection | 1" outside thread | ||
| mains water connection | ³/₄" outside thread | ||
| Output to consumers | 1" outside thread | ||
| Water connections of the submersible pump | |||
| Suction connection | 1" nozzle | ||
| Discharge connection | 1 ¹/₄" inside thread | ||
| Sound pressure level in the house | |||
| Rainwater operation | 52 dB (A) | 57 dB (A) | |
| Mains water mode | 63 dB (A) | ||
| Pump capacity of entire system | |||
| Maximum delivery head (at 20 l/min) | 30 m | 40 m | |
| Pressures | |||
| Switch-on pressure for the pumps of the rainwater works | 1.5 bar | ||
| Max. Operating pressure rainwater operation | 4.2 bar | 5.3 bar | |
| Max. Max. operating pressure mains water operation | 3.3 bar | 4.4 bar | |
| Max. permissible operating pressure | 8 bar | ||
| Mains water connection | |||
| Min. inlet water pressure | 1 bar | ||
| Max. inlet water pressure Inlet water pressure | 6 bar | ||
| Water top up volume (at 3 bar, cross-section ³/₄") | approx. 95 l/min | ||
| Max. Water temperature | 35° C | ||
| Volume of intermediate storage tank | 9 litres | ||
| Dimensions | |||
| Wall unit (depth x width x height in mm) | 315 x 500 x 510 | ||
| Scope of delivery | |||
| Rainwater system (wall-mounted unit with centrifugal pump, ZETA 02 automatic switch and intermediate storage tank) | |||
| Wall bracket | |||
| Provedo VX submersible pump with floating fine suction filter and float switch | |||
| Baseplate for submersible pump made of stainless steel | |||
| Stainless steel fine suction filter with suction hose | |||
| Labelling set |