Urinal Flush Control Valve

How much water do Cistermiser valves save?

Urinals account for a very large percentage of the water used in most buildings. Installing Cistermiser water management valves saves 60% to 80% of water consumption in typical urinal installations. This equates to over £350 per annum per cistern, so urinal water management is essential for any building. Most Cistermiser valves pay for themselves in 6 to 9 months

I want to install a hydraulic valve, which one should I use?

The key is to accurately assess the supply pressure and select the appropriate valve - see ‘valve identification and application’. As a reminder the STD valve is designed for use with mains pressure or tank-fed systems with more than 5 metres’ head, the LP is for tank fed systems of 3 to 5 metres’ head and the HSLP for 0.5 to 3 metres’ head.

There is more than one cistern; can one valve be used to control them all?

Yes, although this depends on ensuring that:

• Water is delivered at sufficient pressure, normally from a mains supply.
• There is adequate water volume to fill all the cisterns
• The pipe-work feed system ensures equal distribution of water to all cisterns If possible find out:
• Whether there is tank or mains water supply
• How many cisterns are involved and their capacities
• If all cisterns are in the same washroom area and fed from a common water supply

It is essential to ensure equal water flow to all cisterns.Often outlets to each cistern ‘T’ off after the supply valve in sequence, in which case the first cistern will receive more water than the second and so on down the line to the extent that a third cistern may be starved of water altogether. The best way to prevent this and ensure an equal flow of water is to arrange the water supply so that each cistern is filled by equal pipe lengths from a single valve. Another method of addressing this issue with existing systems is to install restrictors (a pet-cock or bib-tap) on the outlets to the cisterns to restrict individual flows, which then ensures that each cistern receives an equal amount of water.

It is possible to set a hydraulic valve to pass sufficient water to fill more than one cistern per activation (opening) provided the valve is being fed at mains pressure. However for this more unusual application, the IRC can offer additional benefits.

The IRC is the simplest option for controlling multiple cisterns from one valve due to the fixed open time (of 30 minutes) per activation and the variable flow restrictor features that allow the water volume into each of the cisterns to be more accurately and reliably gauged.

Can valves be installed on vertical pipe work?

The STD, LP and IRC solenoid valves should operate satisfactorily on vertical pipe work although it is preferable for the hydraulic valves to be mounted on horizontal pipe work if at all possible. The HSLP must be installed on horizontal pipe work. It is preferable for the hydraulic valves to be installed upright but if proximity to the ceiling or wall prevents this they can be tilted forward as necessary.

Which is the best valve to use for which application?

All Cistermiser valves are designed and manufactured to the same high standards and

WRAS approved, so their selection should be made on which is most appropriate to site circumstances

i.e.Typically:

• For factories or environments where the washrooms are used regularly and where cost is more important than aesthetics, the hydraulic valve is often the most suitable.
• In buildings where the washrooms are used at irregular intervals (offices, schools, village halls etc) STD and LP hydraulic valves with hygiene flush attachments (HF) should be used. For applications requiring even higher levels of accuracy or where there is a risk of vandalism the IRC valve is a good option because it includes an integral ‘hygiene flush’ feature, which improves accuracy and can be mounted directly on the pipes, on the wall or inset in the ceiling to reduce the risk of vandalism. The IRC can operate on batteries as well as mains power.

Can one IRC sensor control two solenoids?

No, the electronic impulse generated by the sensor is not designed to open two solenoids; although some installers have tried it successfully we do not endorse it.

How do I control the amount of water going through the valve and into the cistern?

Hydraulic Valves - By adjusting the control screw (“restrictor”) on the side of the valve which controls the time that the valve remains open each time it is activated (opened). The details are included in the installation instructions with every valve and also posted on this web site the further the restrictor is turned in, the longer the valve will stay open and the more water will be allowed into the cistern every time the valve is activated. This should be set at installation but can be changed using the red allen key at any time.

IRC Valves - The flow control is via a screw on the bottom of the brass block which can be adjusted with a screw driver.

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