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Water Audit – Leak in a dead end pipe

Client Name: A leading property management company

Desktop analysis at a client’s site for the water and associated services showed the supply was consuming significantly more water than expected, at 120m3/day. This allowed Inenco’s Solutions Team to make a recommendation for the completion of an on-site audit. The consumption being used had previously not been raised as an issue prior to Inenco’s assessment. (The usage had been at a similar level since 2002).

Inenco carried out numerous on-site surveys, making initial recommendations to clarify areas of consumption, by installing sub-meters in the higher consuming units.

The above installations highlighted some small areas of leaks and defective fittings which were rectified. The main area of use being defective were urinals. Inenco made recommendations for PIR sensors to be fitted to control flushing. The result of these actions reduced usage by approximately 18%, which was still too high.

With all the internal use accounted, Inenco undertook a supply tracing exercise. This was a complicated process as no water services plans existed.  The tracing work identified the location of the mains pipework underground and above ground throughout the site. The latest technology of online leak detection microphones was undertaken on the underground pipe, allowing the site to continue to operate whilst the work was undertaken. This confirmed the presence of further leaks. Further investigation, including the installation of isolation valves to section out the site’s underground pipework, identified an unused section of pipework.  The section of pipework had been installed during the site construction, to serve external garden watering points but was never used. This was capped, and a hydrant fitted at the end of the section for future grounds watering if required.

The work carried out by Inenco to identify and fix the leak led to a 90% reduction in consumption of clean water (saving over 100,000 liters a day) and converting to a projected saving in excess of £100,000/annum.

Inenco is now in contact with the water retailer to apply for a refund of the charges previously incurred.

What can we learn from this?

Common Problem

Whilst the bills were technically correct, It is estimated that 3.1 billion liters of water consumed each day, is derived from leaks. This represents a significant opportunity for the client to identify savings to their clients, utilising Inenco’s expertise

Inenco audit capabilities

Inenco has a team of qualified engineers that are able to attend the site to complete audits and identify potential water savings opportunities for our client’s clients.