Мембрана для автоматичного перемикання передач WISY ZETA 02

The membrane is a central component of the WISY ZETA 02 switching device. We recommend replacing it after approximately 10 years, as it becomes brittle over time, changes shape, and may lead to unwanted water leakage. The replacement is straightforward:

Replacing the membrane:

• Unplug the power cord and turn off the water supply.
• Loosen the six screws on the head of the switching device and remove the cover.
• Remove the old membrane, unscrew the plastic plunger in the center.
• Screw the plastic plunger onto the new membrane and insert it.
• Replace the cover with spring and tighten it.
• Turn the water supply back on and plug in the power cord.

Important note regarding the appearance of the rubber membrane:
The new membrane may appear visually different (more angular), but it is the correct original replacement part. Additionally, it is factory-coated with a white release agent (e.g., talcum powder) to prevent sticking during storage. This may cause the membrane to look used at first glance or show white residues. This is a normal technical process – it does not affect the function or quality of the membrane.

Is replacing the membrane worthwhile, or is a new switching device better?

If your switching device is already 10 years or older, it is usually not a ZETA 02 model but older switching devices such as the SA06 or Controlmatic E. These devices often have a high standby power consumption of up to 8 watts. In this case, it may be worthwhile to upgrade to a new, efficient ZETA 02 switching device. This offers several advantages:

Energy savings:

The ZETA 02 requires only 0.2 watts in standby, which can save up to €350 over the device's lifetime and reduce up to 25 kg of CO2 emissions annually.

Increased safety:

When replacing the membrane, the threads in the plastic may be overstressed. This poses a risk that the housing may give way under pressure and the cover may lift. In this case, the pump would continue to operate uncontrollably until someone pulls the plug. This could lead to the cistern being pumped empty and, if necessary, the drinking water refill being activated.

Simple replacement:

Customers who only replace the membrane often have questions about fit, sealing, and installation. A new switching device eliminates this effort and ensures reliable operation without uncertainties.

Our recommendation:

For switching devices older than 10 years, switching to a new ZETA 02 is usually the better choice – both economically and from a safety perspective.

* порівняно з автоматичним вимикачем зі споживанням у режимі очікування 8 Вт, терміном служби Zeta 02 15 років при 23 годинах очікування на добу, 37 кт/кВт-год та 380 г викидів CO2/кВт (німецький енергобаланс 2024 року).