If your system is gravity fed, you will typically find a hot water cylinder in the airing cupboard and a cold water tank in the loft.
Combination Boiler
Combination boilers, usually located in the kitchen, instantly heat mains fed cold water and therefore do not require storage tanks.
Pressurised System
If your system is an unvented cylinder, a hot water cylinder will usually be located in the airing cupboard with a pressure vessel on top.
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Using the cost savings on your bills, this tap would pay for itself in just 18 months.
Based on the average adult using minutes of water a day, we estimate your water and sewage bills could reduce by approximately £131 per year by using this tap. That's 12,236 litres of water a year that won't need treating!
The average household
