Filling valve for Hydroland SLIM and STANDARD concealed WC frames

Product detailed description

Concealed cistern systems in modern sanitary installations require precise water control to ensure efficient and quiet operation. Installers working on residential and commercial bathrooms often encounter issues such as slow filling, continuous dripping, or excessive noise from the filling valve. These problems typically arise from wear on the internal components of the cistern, particularly the float valve. In such cases, replacing the filling valve is a targeted solution to restore functionality without the need for full cistern replacement.

The Hydroland STEL.Z.NAP.SL filling valve is specifically engineered for use with concealed cisterns in the SLIM and STANDARD toilet frames. It is designed to integrate seamlessly with the internal geometry of these cisterns, ensuring a secure fit and reliable sealing without requiring modifications to the inlet pipe. This eliminates the need for cutting or adapting the connection, which is often required when using generic float valves. The valve is typically replaced when the cistern fills too slowly, continues to drip after filling, or produces abnormal noise during operation.

Technical parameters

Brand	Hydroland
Type	Filling (filler) valve
Compatible with	Concealed cistern SLIM
EAN	5903887105262
Manufacturer	Hydroland
Manufacturer code	STEL.Z.NAP
Type	Filling valve
Warranty	2 years
Code	STEL.Z.NAP.SL
Brand	Hydroland

The technical parameters listed define the compatibility and function of the valve. The EAN code ensures correct identification for ordering and inventory purposes. The 2-year warranty reflects the expected service life under normal operating conditions. The compatibility with SLIM and STANDARD models is essential for correct installation, as other models such as SMART and FIT use different valve designs.

Installation and connection

To replace the filling valve, the cistern must be drained and the existing valve removed. The new valve is inserted into the inlet pipe and secured in place. No cutting or threading of the pipe is required, as the valve is designed to fit directly into the existing connection. The inlet pipe is typically a standard water supply line connected to the cistern. During installation, ensure that the valve is fully seated and sealed to prevent leaks. Common mistakes include using a valve not designed for the specific cistern model, which can lead to improper sealing and continued water loss.

Compatibility and accessories

This filling valve is compatible with concealed cisterns in Hydroland SLIM and STANDARD toilet frames. It is not suitable for use with SMART or FIT models, which require a different valve type. When replacing the filling valve, it is recommended to inspect the inlet hose for signs of wear or damage. If the hose is also degraded, it should be replaced together with the valve to ensure a complete and reliable system. No additional accessories are required for installation, as the valve is designed for direct replacement.

Technical background for designers

The filling valve operates by allowing water to flow into the cistern until the water level reaches a predetermined point, at which the valve closes to stop further inflow. The design of the valve ensures a tight seal to prevent water loss while maintaining a steady and quiet filling process. The materials used are selected for their resistance to corrosion and wear, ensuring long-term reliability in a wet environment. The integration of the valve into the cistern system is critical for maintaining the efficiency of the toilet frame. Factors such as water pressure and flow rate can affect the performance of the valve, and these should be considered during system design.

Service and operation

Regular inspection of the filling valve is recommended to ensure continued performance. Check for signs of wear, such as slow filling or continuous dripping, which may indicate the need for replacement. No scheduled service intervals are specified, but the valve should be replaced when it no longer functions reliably. During operation, ensure that the water supply is stable and that the cistern is free from debris that could interfere with the valve's function. A properly functioning filling valve contributes to the overall efficiency of the toilet system.

Frequently asked questions

Can this valve be used with other Hydroland toilet frames besides SLIM and STANDARD?
No, it is specifically designed for SLIM and STANDARD models. SMART and FIT models require a different valve type.

Is it necessary to replace the inlet hose when replacing the filling valve?
If the hose is also worn or damaged, it should be replaced to ensure a complete and reliable system.

Can the valve be installed without cutting the inlet pipe?
Yes, the valve is designed to fit directly into the existing inlet pipe without requiring modifications.

What are the signs that the filling valve needs to be replaced?
Slow filling, continuous dripping after the cistern is full, and abnormal noise during operation are common indicators of a faulty valve.

Documents for download

• Toilet accessories (PDF)