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IRC® Valve


The Infrared Urinal Flush Control (IRC®) valve automatically manages the supply of water to a urinal cistern. The PIR sensor detects movement and activates the solenoid valve, allowing water into a urinal cistern.

Reduces water consumption by up to 80%

How it works

The Infrared Urinal Flush Control (IRC®) consists of a solenoid valve and the sensor module.

When the IRC® detects movement in the washroom, a pulse from the sensor opens the normally-closed solenoid valve and water flows to the cistern; at the same time the sensor is switched off.

After 25 minutes the power is restored to the sensor and, as long as no movement is detected for 5 minutes, the solenoid valve closes, shutting off the water supply to the cistern.

  • Ensures compliance with the Water Regulations
  • Can be concealed to reduce the risk of vandalism
  • Battery or mains powered (no external transformer required). IRC® can use batteries as back-
  • up power to mains supply if required.
  • Pipe, wall or ceiling mounted sensor: surface mounted or recessed
  • On DEFRA’s Water Technology List; purchase and installation are tax deductible
  • Visible LED status indicator and low battery alert
Reducing water wastage and costs

 The new-look IRC® - launched mid December 2018

Installing a Cistermiser IRC® valve can save on average 129,600 litres of water per year and reduce costs by up to £301 per urinal bowl.

Specification Information

The solenoid assembly is plumbed in on the water supply to the urinal cistern. The connection to the infrared sensor is made either by directly mounting the sensor module on to the solenoid or by using the ‘floating socket’ supplied for a remote mounting. If mounted remotely, the sensor module may be: 

  • Surface mounted using a standard pattress box.
  • Recessed into a suspended ceiling using the ‘ceiling mounting kit’ (CMK), supplied with the IRC® as standard.


If the sensor detects no occupancy in 12 hours it will automatically open the valve for 30 minutes to allow one flush of the cistern to rinse the urinals and pipework.

The sequence is designed to maximise battery life, giving approximately 3 years’ life from one good quality set of batteries.

The flow rate of the water into the cistern is adjustable to maximise water economy. Generally this should be set so that the cistern flushes once every time the valve is opened. i.e. every 30 minutes during occupation.

The solenoid is supplied with an interchangeable valve seat which is used to increase the flow to the cistern on low pressure supplies.

The IRC® sensor unit is contained within a white moulded ABS case designed to fit directly on to the solenoid valve assembly or a standard 3.25” x 3.25” (83mm x 83mm) pattress box for surface mounting.

At the back there is access to the battery compartment or terminals for a 230V mains power supply to the integral and in-built transformer and the 6V DC output to the solenoid.

85 x 85 x 63.5mm (W x H x D) including the sensor lens

approx 3.5m field of view, 138˚ horizontal, 125˚ vertical

solenoid voltage         
6V DC nominal 54μA, peak 750mA, for 50ms

mains supply              
220V – 240V 50hz 20mA

battery supply             
4 x 1.5V Alkaline Type LR6 – Cap. 2700mAh

solenoid valve            
6V latching valve, UK WRAS approved. One valve per sensor.

water supply                
0.1-6 bar (For >6 bar a pressure reducing pressure valve is required). Integral, adjustable flow regulator and interchangeable valve seat.

Case Studies

Coming soon!

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