Producto terminadoview
The TOTO Aquia IV Dual Flush Toilet Tank (Model ST446EMNA#01) is designed for use with the TOTO Aquia IV dual flush toilet bowl. This tank features a dual-flush system, allowing users to select between two flush volumes to conserve water. It is also compatible with TOTO T40 WASHLET+ and Auto Flush systems for future upgrades.

Image: TOTO Aquia IV Dual Flush Toilet Tank in Cotton White. This image shows the exterior of the toilet tank, highlighting its clean lines and the chrome push-button flush mechanism on top.
Características principales:
- Sistema de doble descarga: Offers 1.28 GPF (Gallons Per Flush) for standard use and 0.9 GPF for lighter flushes, promoting water conservation.
- WASHLET+ and Auto Flush Compatibility: Designed to integrate seamlessly with TOTO T40 WASHLET+ bidet seats and Auto Flush kits for enhanced hygiene and convenience.
- Certificado WaterSense: Meets EPA WaterSense criteria, as well as California's CEC and CALGreen requirements for water efficiency.
- Componentes incluidos: Tank to bowl gasket, tank to bowl hardware, and toilet bolt caps are included.
Configuración e instalación
This section provides general guidelines for installing the TOTO Aquia IV toilet tank. Professional installation is recommended. Ensure all local plumbing codes are followed.
Antes de comenzar:
- Ensure you have the compatible TOTO Aquia IV toilet bowl.
- Gather additional necessary items (purchased separately): toilet bowl, wax ring, toilet mounting bolts, and water supply lines.
- Cierre el suministro de agua al área del inodoro.
Pasos de instalación:
- Preparar el recipiente: Place the toilet bowl in its intended position over the floor flange. Ensure it is level and stable.
- Instalar el anillo de cera: Carefully place a new wax ring onto the floor flange or the base of the toilet bowl.
- Asegure el recipiente: Lower the toilet bowl onto the wax ring and floor bolts. Press down firmly and evenly to create a seal. Secure the bowl with toilet mounting bolts and caps. Do not overtighten.
- Attach Tank to Bowl: Position the tank to bowl gasket onto the flush valve opening on the bottom of the tank. Carefully align the tank with the bolt holes on the back of the toilet bowl.
- Fasten Tank: Insert the tank to bowl hardware (bolts, washers, nuts) through the tank and bowl holes. Hand-tighten the nuts evenly until the tank is snug and stable. Avoid overtightening to prevent cracking.
- Conectar el suministro de agua: Connect the water supply line from the shut-off valve to the fill valve inlet on the bottom of the tank. Hand-tighten, then use a wrench for a final quarter-turn. Do not overtighten.
- Compruebe si hay fugas: Turn on the water supply slowly and check all connections for leaks. Allow the tank to fill.
- Instalar la tapa del tanque: Place the tank lid with the chrome dual flush push button onto the tank.
Instrucciones de funcionamiento
The TOTO Aquia IV tank features a dual flush system controlled by a chrome push button located on the tank lid.
Operación de doble descarga:
- Descarga completa (1.28 GPF): Press the larger section of the chrome push button for a full flush, suitable for solid waste.
- Light Flush (0.9 GPF): Press the smaller section of the chrome push button for a light flush, suitable for liquid waste, conserving water.
WASHLET+ and Auto Flush Compatibility:
This tank is designed for compatibility with TOTO T40 WASHLET+ bidet seats and TOTO Auto Flush kits. If you are upgrading to these systems, refer to the specific installation and operation manuals provided with your WASHLET+ or Auto Flush kit for detailed instructions on integration and use.

Image: A TOTO WASHLET+ toilet bowl with a visible water stream, illustrating the advanced cleaning features. This image demonstrates the type of system the Aquia IV tank is compatible with for enhanced functionality.
Mantenimiento
Regular maintenance ensures optimal performance and longevity of your TOTO Aquia IV toilet tank.
Limpieza:
- Limpie el exterior del tanque con un paño suave y un limpiador suave, no abrasivo.
- Avoid harsh chemicals, abrasive pads, or cleaners containing bleach, as these can damage the finish and internal components.
- For the chrome push button, wipe with a damp Paño y séquelo inmediatamente para evitar manchas de agua.
Internal Components Check:
- Periodically remove the tank lid and inspect the fill valve and flush valve for any signs of wear or damage.
- Ensure the water level is at the marked waterline inside the tank. Adjust the fill valve if necessary according to the manufacturer's instructions for the specific fill valve model.
- Check for any mineral buildup, especially in hard water areas. Clean with a vinegar solution if needed, ensuring to rinse thoroughly.
Solución de problemas
This section addresses common issues you might encounter with your toilet tank. For more complex problems, consult a qualified plumber.
Problemas comunes y soluciones:
- Agua corriente continua:
- Check if the flush valve flapper/seal is properly seated.
- Inspect the fill valve for proper operation and ensure the float cup is not obstructed.
- Verify the water level is not too high, causing water to overflow into the overflow tube. Adjust the fill valve if needed.
- Color débil:
- Ensure the water level in the tank is at the correct mark.
- Check if the flush chain (if applicable) has enough slack to allow the flapper to open fully.
- Inspect the rim jets under the toilet bowl rim for clogs.
- Leaks Around the Tank Base:
- Tighten the tank-to-bowl bolts evenly, but do not overtighten.
- Inspect the tank-to-bowl gasket for damage or improper seating. Replacement may be necessary.
- Verifique que la conexión de la línea de suministro de agua esté bien ajustada.
Presupuesto
| Número de modelo | ST446EMNA#01 |
| Marca | TOTO |
| Color | Algodón blanco |
| Material | Plastic (Internal Components), Vitreous China (Tank Body) |
| Dimensiones del producto | 27.75"D x 16.5"W x 30.5"H (Overall toilet dimensions with compatible bowl) |
| Peso del artículo | 29 libras |
| Tipo de descarga | Doble descarga (1.28 GPF / 0.9 GPF) |
| Compatibilidad | TOTO Aquia IV Toilet Bowls, TOTO T40 WASHLET+, TOTO Auto Flush |
| Certificaciones | EPA WaterSense, California CEC, CALGreen |
| Código Postal | 739268425729 |
Información de garantía
TOTO products are manufactured to high-quality standards. Specific warranty details for the Aquia IV Dual Flush Toilet Tank (ST446EMNA#01) are typically provided with the product at the time of purchase or can be found on the official TOTO webSitio web. Conserve su comprobante de compra para reclamaciones de garantía.
For detailed warranty terms and conditions, please visit the official TOTO USA website or contact TOTO customer service.
Atención al cliente
If you require assistance with installation, operation, maintenance, or troubleshooting that is not covered in this manual, please contact TOTO customer support.
- Recursos en línea: Visit the official TOTO USA webSitio para preguntas frecuentes, registro de productos y documentos de soporte adicionales.
- Contact TOTO: Refer to the contact information provided on the TOTO websitio o en el embalaje de su producto para obtener asistencia telefónica y por correo electrónico.
- TOTO Store: También puede encontrar más información y productos en TOTO Amazon Store.





