Flush valve for toilet cistern Nicol SIL50 1/2 bottom inlet

The Nicol SIL50 1/2 flush valve is a replacement flush mechanism intended for toilet cisterns with a 1/2 connection and bottom inlet. Designed for domestic sanitary installations, this component controls the release and refill of water inside the cistern and is suitable for repair or upgrade of compatible WC tanks. The unit fits into the cistern base and works with standard plumbing connections used in many household toilets.

Advantages

The flush valve offers a compact design adapted to bottom-entry cisterns and a 1/2 threaded connection for a secure fit. Constructed from materials resistant to typical household water conditions, it provides reliable operation for normal flushing cycles and refill processes. The mechanism is engineered for straightforward replacement of worn or damaged valves in compatible toilets without requiring major changes to existing plumbing.

Suitable for

• Repair of domestic toilet cisterns with bottom inlet
• Replacement of worn or leaking flush valves in compatible WC tanks
• Upgrading sanitary components in residential bathrooms
• Standard plumbing installations using 1/2 threaded bottom connections

Key specifications

• Connection type: bottom inlet with 1/2 threaded connection
• Function: control of water release (flush) and cistern refill
• Installation position: base/bottom of the toilet cistern
• Application: domestic sanitary cisterns and compatible WC tanks
• Design: replacement flush mechanism suitable for standard household use

How to use

Shut off the water supply to the cistern and drain remaining water before beginning work. Remove the cistern lid and detach the old flush valve following the cistern manufacturer’s instructions. Install the Nicol SIL50 1/2 flush valve into the bottom inlet, ensuring the 1/2 threaded connection is properly seated and sealed. Reconnect water supply, check for leaks, and test multiple flush cycles to confirm proper operation and refill behavior. Adjustments may be necessary to achieve the desired flush volume and refill level.

Usage recommendations

Use basic hand tools and appropriate sealing materials when installing the valve. Inspect seat and sealing surfaces for damage before fitting the new mechanism and replace any degraded gaskets. If uncertain about compatibility or installation, consult a qualified plumber to ensure correct fit and leak-free operation.