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Royal United Hospital Bath is saving and managing water via sustainable water pressure management using Aquavent’s Aquai-Mod stainless-steel hydraulic flow modulator.

The Royal United Hospital Bath NHS Trust provides acute treatment and care for a catchment population of around 500,000 people in Bath and the surrounding towns and villages.

The Trust provides 687 beds and a range of services including medicine and surgery, services for women and children, accident and emergency services, plus diagnostic and clinical support services.

The hospital provides healthcare to the population served by three primary care trusts (PCTs).

Andy House, estates manager, has been focused on improving the site-wide operational performance of the hospital and at the same time researching ways to reduce costs and reduce impact on the environment.

Water costs were a primary focus for House and knowing that the system was not pressure managed and therefore potentially over pressurised particularly during night time where there is lower demand, he knew there must be scope to improve the system.

Aquavent conducted a comprehensive survey of the existing water system to fully understand the pressures and flows that the hospital required to meet its 24-hour operation.

From the data collected and the cost plan provided, including predicted savings, Aquavent’s sustainable water pressure manager David Hurley agreed an action plan, which included the installation of a new pressure-reducing valve and an Aquai-Mod stainless-steel hydraulic flow modulator.

House said: ‘After two weeks, [the installation] coped with an unexpected water main burst in our suppliers pipe network that feeds the hospital.

‘Pressures were between 35 and 40m head and these have been reduced to 20 and 27m head, a 48 per cent reduction.

‘The consequence of this is a reduction in flows from 250,000 to 900,000 litres per day to 200,000 to 800,000 litres per day,’ he added.

‘Water and hence cost savings have been immediate and are expected to be around 24 million litres per year, with capital payback within one year.

‘We will also be looking at the impact on our carbon reduction because of this installation,’ he added.

Aquavent is undertaking initial servicing of the equipment and providing training for the hospitals engineers, with a view to assisting with further system improvements in the medium to long term.

The company is also looking to provide ongoing solutions including low-pressure alarm systems via remote PC and mobile phone texts.

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