Geberit Pneumatic Dual Flush Activation Unit

Geberit Pneumatic Dual-Flush Lifter (240.574.00.1)

The Geberit 240.574.00.1 is the activation bellows responsible for triggering the flush in pneumatic concealed cisterns. It is specifically designed to work with the Kappa (240.638.00.1) and the UP170 outlet valves.

If your toilet has a “soft-touch” button connected by green and clear hoses, this is the unit that converts that air pressure into physical movement to lift the valve and release the water.

How It Works (And Why It Fails)

The lifter does exactly what the name suggests: it “lifts” the heavy outlet valve.

• Activation: When you press the flush button, air travels through the pneumatic tubes into this bellows unit.

• The Lift: The air pressure causes the lifter to expand, physically raising the outlet valve to start the flush.

• The Fault: Because this part is made of flexible materials and moves with every single flush, it is a high-wear component. After years of use, the bellows can develop micro-tears or lose its “spring,” resulting in a flush that is weak, intermittent, or fails to trigger entirely.

The “Perfect Pair” Recommendation

If you are already replacing a leaking or sticking 240.638.00.1 (Kappa) or UP170 valve, we always recommend replacing the lifter at the same time. > Why? These parts are usually the same age. Replacing only the valve when the lifter is nearing its failure point often leads to having to pull the cistern apart again just weeks later. Replacing them together guarantees a “like-new” flush for another 10+ years.

Identification Checklist

• Hose Colors: Look for the signature green and clear pneumatic tubes.

• Compatible Valves: Strictly for the Geberit Kappa (240.638.00.1) and UP170 series.

• Symptom: Buttons feel normal but the water doesn’t release, or you have to press the button multiple times to get a response.

Why Choose Sydney Tap & Bathroomware?

We are Australia’s trusted source for Geberit maintenance, ensuring your bathroom is back in action faster than anyone else.

• 8/10 Orders Delivered Early: Our fast-tracked logistics mean less downtime for your toilet.

• Less than 24-Hour Handling: We prioritize spare parts orders for immediate dispatch.

• Plumber-Ready Pickup: Available for same-day collection from our Mascot showroom—perfect for emergency repairs.

• Genuine Parts Only: We only sell 100% genuine Geberit components to ensure a perfect fit and long-term reliability.