Wall Hung refers to toilets that have a hidden tank and flush system installed in the wall and the toilet bowl is suspended on a steel base or metal frame attached to the wall. This design saves space, looks beautiful and makes it easier to clean the bathroom environment.

### 2. The main components of Wall Hang
1. Installation frame (Carrier Frame):
Made of galvanized steel or stainless steel with a load bearing capacity of at least 400 kg. 
   Coating: epoxy electrostatic powder according to EN 13501-1 standard. 

2. Ceramic wall hung bowl:
Production of pressed porcelain glaze with less than 0.5% water absorption according to EN 997 standard. 
Equipped with dual flushing system (Dual Flush Mechanism). 

3. Concealed cistern: It is usually made of reinforced polypropylene. 
Sound insulation and resistant to water pressure up to 10 bar according to ISO 3822 standard. 

4. Pneumatic or mechanical flush key (Flush Plate):
Made of ABS or 304 steel with soft pressure design and high durability. 

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### 3. Types of hang frame wall in terms of installation structure
| Frame type Application | Profile thickness Installation height
| Universal Frame | New buildings 3-4 mm 112 cm |
| Compact Frame | Reconstruction of small service 2.5 mm 82 cm |
| Light wall frame (Drywall Frame) | Kenaf or light walls 2 mm 112 cm |

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### 4. Advantages and technical features
✅ modern and minimal beauty in interior design
✅ saving space and increasing floor cleaning
✅ reducing flash noise compared to external flash tanks
✅ the ability to adjust the height of the bowl during installation
✅ high resistance to moisture and pressure

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### 5. Installation standards and requirements
| row | Standard Standard title Scope of application |
|-------|------------|------------------|----------------|
| 1 | EN 997 | WC Pan & Flushing Systems | Assessment of performance and water consumption |
| 2 ISO 3822 | Acoustics - Laboratory Tests on Water Fittings | Functional sound control of equipment |
| 3 | EN 14055 | WC & Urinal Flushing Cisterns | Requirements of built-in flash tanks |
| 4 ISIRI 9116 | Sanitary equipment Safety and mechanical operation in Iran |

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### 6. The top brands and models of the Iranian market - Geberit Wall Hang Group - Made in Switzerland
- Duravit Wall Hang - Made in Germany
- Marwarid Wall Hang - Made in Iran with national standard 9116
- Tesa and Homex built-in frames - can be installed in Drywall systems

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### 7. Implementation and control points - The installation distance of the outlet center from the floor: 22 ± 1 cm
- The height of the sitting surface installation: 42 ± 2 cm
- Be sure to use acid and chlorine-resistant EPDM seals and connections. 
- Reservoir pressure test is required before wall covering. 

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### **8. Summary
Walhang system as a new generation of sanitary equipment is a combination of structural engineering, space optimization, and European minimal design. 
In the modern projects of hotels, commercial centers, and luxury residential units, the use of wall hangers in compliance with the above EN and ISO standards increases the value and durability of the structure