Cost Saving Comparison – No Flush Control Valve v Cistermiser Flushing Control Valves

These figures are designed to be used as an indication of costs only based on the assumptions shown.The calculations are for a typical installation and will vary depending on the actual installation design and usage.

Metered water and sewerage charges: £2.20/cubic metre

Water Consumption – Cistern with No Flush Control

Number of flushes per hour	4
Hours per day	24
Days per year	365
Cistern flushing capacity - litres	9
Water used per year - litres	315.360
Water used per year - cubic metres	315.36
Annual water cost	£693.79

Water Consumption – Cistern with Cistermiser IRC Flush Control

Number of flushes per hour (unlimited urinal usage)	4
Hours per day	12
Days per year	365
Cistern flushing capacity – litres	9
Water used per year – litres	78,840
Water used per year – cubic metres	78.84
Annual water cost	£173.45

Water Consumption – Mains with Cistermiser Direct Flush Control

Number of flushes per hour (3 urinals each used once every 5 minutes)	36
Hours per day	12
Days per year	365
Cistern flushing capacity – litres	0.5
Water used per year – litres	78,840
Water used per year – cubic metres	78,84
Annual water cost	£173.45