The Maxima rainwater unit ensures a high supply capacity thanks to the large hybrid tank. In doing so, it combines all components required for operating the rainwater supply 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 required, buffer volume 350 l for high demand peaks. Complies with DIN 1989 and DIN EN 1717.

Volume: 350 litres
Overall height: 1.54 m
Diameter: 0.77 m

The installation and operating instructions for this product are provided in German and English only. By purchasing this product, you agree to this.

0 of 0 reviews

Leave a review!

Share your experiences with other customers.

The payment is uncomplicated in our store! You can find detailed info about payment and shipping here. We offer the following payment methods:

PayPal Prepayment

Ships Worldwide

Once your order is placed, you will receive a confirmation email letting you know that our fulfillment team has received your order. Once your order is fulfilled, you will receive an email notification with your tracking information. Shipping fees are non-refundable in the case of returns. We ship with:

Parcel shipping Pallet delivery Delivery by WISY AG Collection in Hitzkirchen, Germany

Suitable for WISY

Matching connection sets

Rainwater works

Sigma rainwater unit Sigma rainwater unit
Multimat rainwater unit Multimat rainwater unit
Optima rainwater unit Optima rainwater unit
Optima Plus rainwater unit Optima Plus rainwater unit
Optima Plus rainwater unit
Variants from €3,248.70*

Article number

Product Article number
Maxima 205 control unit fixed to the unit ZE 9901
Maxima 407 Control unit fixed to the unit ZE 9903

Hybrid unit in the house:

  • Capacity 350 l, with emergency overflow DN 100
  • multistage submersible pressure pump, Multigo 205 or 407 with rubber base
  • automatic switch Zeta02/V with manometer
  • electronic control unit
  • automatic drinking water feed
  • free drinking water outlet (1⁄2" for Maxima 205, 3⁄4" for Maxima 407), with solenoid valve, ball valve and safety strainer
  • Non-return valve in rainwater feed line
  • Hose connection set for Maxima, consisting of connecting hose 0.50 m, 1" O.D., brass ball valve with IT, (3⁄4" for Maxima 205, 1" for Maxima 407)
  • Marking set


  • Container diameter: ø 700mm
  • Height container: 1.225mm
  • Total height 1350mm

Storage tank equipment with:

  • Provedo-Doc (VX) submersible charging pump with permanently mounted vertical float switch, 15 m connection cable, 1¼" nozzle with non-return valve on the pressure side, 3 m support cable and hook screw.
  • stand plate 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 0.75 m highly flexible suction hose