Description
The Geberit Sigma8 Concealed Cistern is a high-quality in-wall flushing system designed to deliver reliable performance, water efficiency, and a clean modern bathroom appearance. Installed within the wall cavity, the cistern remains hidden from view, creating a sleek minimalist finish while maximizing floor space and simplifying cleaning.
Manufactured using a one-piece blow-moulded HDPE tank, the Sigma8 offers exceptional durability and leak-proof performance. The front-access service opening behind the flush plate allows convenient maintenance without removing tiles or accessing the wall cavity. Compatible with both wall-faced floor-standing pans and a wide range of Geberit Sigma flush buttons, the Sigma8 is an ideal solution for new builds and renovation projects alike.
Engineered to Swiss quality standards, the Sigma8 combines dependable flushing performance, efficient water usage, and long-term reliability for residential and commercial bathrooms.
Specifications
| Brand | Geberit |
| Type | Concealed In-Wall Cistern |
| Flush Type | Front Flush Mechanical |
| Water Efficiency | WELS 4 Star |
| Flush Volume | 4.5L Full Flush / 3L Half Flush |
| Tank Material | One-Piece Blow-Moulded HDPE |
| Construction | Impact Resistant & Leak-Proof |
| Operating Pressure | 10 – 1000 kPa |
| Installation Type | Concealed In-Wall |
| Wall Requirement | Standard 90mm Wall Cavity |
| Toilet Compatibility | Most Australian Wall-Faced Floor Toilet Pans |
| Mercio Compatibility | Compatible with Mercio Wall-Faced Floor Pans |
| Pan Compatibility | Suitable for S-Trap & P-Trap Toilet Pans |
| Button Compatibility | Geberit Sigma Mechanical & Pneumatic Flush Plates ONLY |
| Service Access | Via Flush Plate Opening |
Package Includes
- Geberit Sigma8 Concealed Cistern
- In-Wall Mounting Components
- Flush & Connection Components
- Installation Instructions
Note: Flush plate/button and toilet pan are sold separately.
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WELS CERTIFIED
You can rely on us, knowing our bathroom and kitchen range meets Australian Standards and Water Efficiency Labelling Scheme (WELS) requirements, ensuring quality and sustainability in every product.
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Fast Shipping
At EM, we provide fast and reliable shipping, so you can enjoy your purchases without the wait. Shop confidently, knowing your order will arrive quickly and hassle-free.
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Easy Returns
We make returns easy with our 30-day return policy, giving you peace of mind with every purchase. If you're not fully satisfied, simply return your item within 30 days for a smooth and stress-free process.
Why Choose Ezymall?
At Ezymall, we focus on combining quality, practicality, and modern design to make your home upgrades simple and reliable.
1. Fast Local Service (Sydney Based)
Order online and pick up within 24 hours from our Sydney warehouse.
Need installation? Our team can help.
2. Certified & Compliant
All products are WELS approved and meet Australian Standards, ensuring safety, quality, and water efficiency.
3. Warranty You Can Trust
We offer extended product warranties, plus labour warranty on selected mixers for added peace of mind.
4. Durable Brass Tapware
- Strong and long-lasting
- Resistant to corrosion and heat
- Naturally hygienic
- Available in modern finishes
A reliable and stylish choice for everyday use.
5. Premium 304 Stainless Steel
- Excellent corrosion resistance
- High durability
- Easy cleaning and hygiene
- Long lifespan and sustainability
Perfect for kitchens and bathrooms.




