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This spare part is the rubber membrane for the ZETA 02 pump controller from WISY.
It can also be used for all SA 06 pump control systems, and for the KSB Controlmatic E.

We recommend replacing the membrane of the pump controller after 10 years.
This is easy to do:
1. unplug the appliance from the mains, switch off the water supply.
2. loosen the six screws on the head of the pump controller and remove the cap.
3. remove the old membrane, unscrew the plastic plunger in the centre
4. screw the plastic plunger onto the new membrane, insert the new membrane
5. replace the cap with the spring and screw tight
6. switch the water back on and plug the mains plug back in.
The old membrane changes shape over time, the new replacement part appears more angular. However, it is still original and fits.

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