The Water Technology List (WTL) provides information on products that meet eligibility criteria in water efficiency. Investing in any product on the WTL not only offers savings on water bills but also a tax incentive to all UK businesses that pay corporation or income tax. The Government's Enhanced Capital Allowance (ECA) scheme allows businesses to write off 100% of the cost of equipment against tax in the year of purchase. This can deliver a helpful cash flow boost and a shortened payback period on investment.

There are currently 14 technology categories:

• cleaning in place equipment
• efficient showers
• efficient taps
• efficient toilets
• efficient washing machines
• flow controllers
• leakage detection equipment
• meters and monitoring equipment
• rainwater harvesting equipment
• small scale slurry and sludge dewatering equipment
• vehicle wash water reclaim units
• water management equipment for mechanical seals
• water efficient industrial cleaning equipment
• water reuse systems

Here is some more information about the scheme extracted from the HMRC website ECA section.