Alca Uni Start / Stop universal toilet cistern, 3/8" filling valve and flush valve A940-H-3/8"

Universal flushing system for any installation

The Alca Uni Start/Stop WC cistern is an advanced solution designed for maximum versatility and ease of use. The START/STOP system allows for precise control over the amount of water consumed - the first press of the button starts the flush, and the second press immediately interrupts it. This solution will be particularly appreciated by those concerned with water conservation and users with special needs.

High-quality construction and materials

The cistern body is made of ABS plastic, which is characterized by high resistance to mechanical damage and moisture. This material ensures long-term stability of color and shape, even during intensive use in a bathroom environment.

Special attention has been paid to thermal insulation - the cistern is insulated against condensation, which eliminates the problem of water vapor condensing on the surface. This prevents unsightly water stains and the development of mold around the flush.

Installation flexibility and compatibility

The water supply system can be connected from three sides: left, right, or rear, providing full freedom in planning the hydraulic installation. This flexibility is particularly valuable when modernizing bathrooms, where existing water connections may be located in various positions.

The universal hangers have been designed so that their spacing and shape are compatible with most existing cisterns. This means that replacing an old flush with a new one usually takes place without the need to drill new mounting holes - significantly simplifying installation work.

Operating parameters and savings

An 8-liter capacity allows for effective flushing of all types of WC bowls available on the market. At the same time, the system enables setting the optimal amount of discharged water within the range of 6-8 liters, which translates into real water savings without loss of functionality.

Hydraulic parameters are selected to ensure reliable operation in diverse conditions. A wide operating range of 0.05-0.8 MPa enables operation even at low installation pressure. The recommended working pressure is within the optimal range of 0.3-0.5 MPa, which corresponds to most standard domestic installations. Additionally, acoustic group II guarantees quiet operation below 30 dB - the noise level does not disturb bathroom comfort even during nighttime use.

It is worth noting one limitation: during high mounting, the STOP function remains unavailable, therefore it is recommended to use this option mainly for medium or low-positioned installations.

Compliance and certificates

The product meets the requirements of European standards:

• EN 14124 - regarding functional requirements for flushing cisterns for toilet bowls
• EN 14055 - standardizing requirements regarding water consumption by sanitary fittings

Classification as Class I operational class guarantees the highest level of reliability and durability of all internal mechanisms.

Complete mounting kit

The standard equipment includes everything needed for installation:

• Filling valve threaded at 3/8 inch
• Flush valve
• Elbow Ø50/40 mm for bottom-mount mounting
• Flushing kit for top-mount (cord, handle, lever)
• Flushing kit for bottom-mount (button)
• Set of mounting elements (screws Ø5×40 mm + plugs Ø8 mm)

The device dimensions are 456×142×440 mm, and its weight is approximately 2.6 kg, making it comparable to traditional ceramic solutions while maintaining significantly greater functionality.